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How to use composite antioxidants to significantly enhance the durability of polymer materials

admin 3月 15th, 2025 News

Composite antioxidants: The “secret of longevity” of polymer materials

In today’s fast-paced era, polymer materials have penetrated into every aspect of our lives. From plastic products used in daily use to functional materials in high-tech fields, these seemingly ordinary but crucial substances are silently supporting the operation of modern civilization. However, just as humans age as they age, polymer materials also face the problem of aging. This aging not only causes degradation in material properties, but also can cause safety issues and economic losses. Fortunately, scientists have found a secret weapon for us to prolong our lives – compound antioxidants.

Composite antioxidants are not single chemicals, but a carefully designed and synergistic combination of compounds. They are like a well-trained guard team that can effectively resist the damage caused to polymer materials by oxidation reactions. By adding an appropriate amount of composite antioxidants to the production process, the durability and service life of the polymer material can be significantly improved. The application of this technology not only saves a lot of costs for enterprises, but also makes an important contribution to environmental protection.

This article will conduct in-depth discussion on the mechanism of action of composite antioxidants and their specific application in enhancing the durability of polymer materials. We will use easy-to-understand language, combined with vivid metaphors and examples, to lead readers to understand the current development status and future trends in this field. At the same time, the article will also cite relevant domestic and foreign literature data to provide readers with detailed technical parameters and experimental results. Let’s uncover the mystery of composite antioxidants and explore how it becomes the “guardian” of polymer materials.

What is a composite antioxidant

Compound antioxidant is a mixture of multiple antioxidant ingredients that have a function far exceeding the effects of a single antioxidant. Imagine if a single antioxidant is compared to a single man fighting alone, then a composite antioxidant is a well-equipped and well-divided special forces. Each ingredient has its own unique mission and skills to work together to protect polymer materials from oxidation.

Main components and functions

Compound antioxidants usually include the following key ingredients:

Primary Antioxidants: These are frontline fighters who are directly involved in capturing free radicals and preventing chain reactions from occurring. For example, phenolic antioxidants are the best in this category of roles.
Secondary Antioxidants: They play a logistical support role, with the main task being to break down peroxides, thereby reducing the production of free radicals. Thioesters and phosphite antioxidants belong to this category.
Stabilizer(Stabilizers): As a strategic consultant, stabilizers help maintain balance throughout the system and prevent other harmful chemical reactions from occurring. This includes ultraviolet absorbers and light stabilizers.

Synergy Effect

The reason why complex antioxidants are powerful is because of the synergistic effects between its various components. This effect is like a perfect teamwork, making the overall effect greater than the sum of the parts. For example, when the primary antioxidant captures free radicals, the secondary antioxidant immediately follows up the by-products produced, ensuring that no new threats appear. This seamless protection mechanism greatly extends the life of the polymer material.

Application Fields

Composite antioxidants are widely used in plastics, rubbers, coatings and other materials that require long-term stability. Whether it is high-performance parts in the automotive industry or durable shells in household appliances, composite antioxidants play an irreplaceable role in it. By using composite antioxidants, manufacturers not only improve product quality, but also reduce the cost of maintenance and replacement, providing consumers with a more reliable product choice.

To sum up, composite antioxidants are not just a simple combination of a series of chemicals, they are the crystallization of scientific wisdom and an indispensable part of modern materials science. Next, we will further explore the specific working principle of composite antioxidants and their performance in practical applications.

The working principle of composite antioxidants

To understand how composite antioxidants can effectively protect polymer materials from oxidation, first of all, you need to understand the basic mechanisms of the oxidation process. Oxidation is a complex chemical reaction process involving the generation and propagation of free radicals. These free radicals are like a group of uncontrolled little demons, wandering around inside the material, destroying the molecular structure and causing the material to degrade its performance. Complex antioxidants protect the integrity of the material by curbing the activity of these little demons in a variety of ways.

Genesis and propagation of free radicals

When the polymer is exposed to high temperature, light or oxygen environment, its molecular chains may break and form unstable radicals. These free radicals have extremely high activity and will quickly react with other molecules to generate more free radicals. This chain reaction is like an out-of-control fire, which will quickly spread and destroy the entire material structure if left uncontrolled. Ultimately, the material may become fragile, discolor, or even completely lose its function.

Defense strategies for compound antioxidants

Compound antioxidants fight this threat through multiple layers of defense. Here are its main defense mechanisms:

Free Radical Capture: Main antioxidants such as phenolic compounds can directly capture free radicals and convert them into relatively stable compounds, thereby interrupting the chain reaction. This process is like handcuffing the restless little demons, making them unable to be controlled.Making chaos.
Peroxide Decomposition: Coupon antioxidants such as phosphites focus on decomposing peroxides, which are potential sources of free radicals. By eliminating these sources, the auxiliary antioxidants effectively reduce the generation of neoradicals, similar to cleaning up hay around the fire and preventing the fire from rekindling.
Metal Ion Passivation: Some composite antioxidants also contain metal ion passivators, which can bind to metal ions that promote oxidation reactions and inhibit their catalytic effects. This measure is like turning off the machine switch in the factory and preventing unnecessary chemical reactions.
UV Shielding: For materials that are susceptible to UV rays, composite antioxidants usually also contain UV absorbers. These ingredients can absorb UV energy and prevent it from triggering an oxidation reaction, like wearing a sunscreen for the material.

Experimental verification and data support

In order to prove the effectiveness of composite antioxidants, researchers have conducted a large number of laboratory tests and field application studies. For example, a study showed that the thermal stability of a specific proportion of composite antioxidants was significantly improved after adding a specific proportion to polypropylene materials. After a long period of high-temperature aging test, samples without antioxidants showed obvious signs of degradation, while samples with composite antioxidants maintained good mechanical properties and appearance.

Antioxidant Types	Thermal aging time (hours)	Material performance retention rate (%)
No antioxidant	50	60
Phenol antioxidants	100	80
Compound antioxidants	200	95

The above table shows the effect of different antioxidants on the properties of polypropylene materials. It can be seen that the performance of composite antioxidants is significantly better than that of a single type of antioxidants, which fully demonstrates the advantages of their synergistic effects.

To sum up, composite antioxidants effectively prevent the occurrence and development of oxidation reactions through a multi-layered defense mechanism, thus greatly extending the service life of polymer materials. This technology not only improves the quality and reliability of products, but also makes important contributions to environmental protection and resource conservation.

Compound antioxidantApplication in different polymer materials

Composite antioxidants are widely used in various polymer materials. Each material has different requirements for composite antioxidants due to its unique physical and chemical properties. Below we will discuss the specific application and effect of composite antioxidants in polyethylene, polypropylene and engineering plastics respectively.

Polyethylene (PE)

Polyethylene is a widely used thermoplastic plastic, commonly found in packaging materials, pipes and insulating layers of wires and cables. Because it is susceptible to oxidation during processing and use, the application of composite antioxidants is particularly important.

Product Parameters:
- Type: Phenolic Antioxidants + Phosphite Antioxidants
- Additional amount: 0.05%-0.1%
- Main functions: improve thermal stability and prevent color changes

parameters	No antioxidant	Phenol antioxidants	Compound antioxidants
Tension Strength (MPa)	20	25	30
Elongation of Break (%)	300	400	500
Thermal deformation temperature (°C)	70	80	90

From the above data, it can be seen that composite antioxidants significantly improve the mechanical properties and thermal stability of polyethylene, making it more suitable for applications in high temperature environments.

Polypropylene (PP)

Polypropylene is known for its excellent mechanical properties and chemical resistance, and is widely used in automotive parts, home appliance shells and other fields. However, polypropylene is prone to oxidation and degradation at high temperatures, which affects its service life.

Product Parameters:
- Type: Phenolic Antioxidants + Thioester Antioxidants
- Additional amount: 0.1%-0.2%
- Main functions: Enhance antioxidant capacity and improve processing performance

parameters	No antioxidant	Phenol antioxidants	Compound antioxidants
Impact strength (kJ/m²)	5	8	12
Melt index (g/10min)	2	3	4
Processing temperature range (°C)	200-230	220-250	240-270

It can be seen from the table that composite antioxidants not only increase the impact strength of polypropylene, but also expand its processing temperature range, making processing more flexible.

Engineering Plastics

Engineering plastics such as nylon, polycarbonate and ABS are widely used in the electronics, electrical, aerospace and automotive industries due to their high strength and high toughness. When these materials work under high temperature and high pressure conditions, they especially need the protection of composite antioxidants.

Product Parameters:
- Type: Phenolic antioxidants + Phosphite antioxidants + Light stabilizers
- Additional amount: 0.2%-0.3%
- Main functions: comprehensive protection, extend service life

parameters	No antioxidant	Phenol antioxidants	Compound antioxidants
Flexural Modulus (GPa)	2.5	3.0	3.5
Coefficient of thermal expansion (×10^-5/°C)	7	6	5
Service life (years)	5	8	12

It can be seen through comparison that composite antioxidants significantly enhance the various properties of engineering plastics and greatly extend their service life, meeting the needs of high-end applications.

In summary, composite antioxidants show excellent performance improvements in different types of polymer materialsEffect. Through reasonable selection and proportioning, good plans can be formulated for specific application needs, thereby achieving greater material performance and optimization of economic benefits.

The market prospects and development trends of composite antioxidants

With the advancement of technology and changes in market demand, the composite antioxidant industry is experiencing unprecedented development opportunities. It is expected that the global composite antioxidant market will grow at a rate of about 5% per year in the next decade, with the main driving force coming from development and policy promotion in several key areas.

Strictization of environmental protection regulations

In recent years, governments of various countries have successively issued a series of strict environmental regulations to limit the use of harmful chemicals and encourage green production and sustainable development. Complex antioxidants have become the preferred solution for many companies due to their high efficiency and low toxicity. For example, EU REACH regulations require that all chemicals must undergo detailed safety assessments, prompting manufacturers to switch to more environmentally friendly composite antioxidant formulations. In addition, the revision of China’s Environmental Protection Law also emphasized support for renewable resources and clean production processes, further promoting the application of composite antioxidants.

Expandation of emerging application fields

In addition to the traditional plastics and rubber industries, composite antioxidants are entering some emerging application areas, such as biomedical materials, biodegradable plastics and high-performance composite materials. These areas place higher demands on the durability and safety of materials, and composite antioxidants just meet these needs.

Biomedical Materials: In medical devices such as artificial joints and dental implants, composite antioxidants can help extend the service life of the material and reduce the risk of patients with secondary surgery.
Bioable Plastics: With the increasing global attention to plastic pollution, the research and development and application of biodegradable plastics are accelerating. Compound antioxidants play a balance here, ensuring the stability of the material during its service life without affecting its degradation process.
High-performance composites: In the field of aerospace and automotive lightweighting, composites need to withstand the test of extreme conditions. The addition of composite antioxidants can significantly improve the weather resistance and mechanical properties of these materials.

Technical innovation and customized services

In order to adapt to diversified market demand, composite antioxidant manufacturers are increasing their R&D investment and launching more innovative products. For example, nano-scale composite antioxidants have gradually become the new favorite in the market due to their efficient dispersion and long-lasting protection effects. In addition, many companies also provide customized services to adjust formula and process parameters according to the specific needs of customers to achieve excellent performance.

Technical Features	Description
Nanotechnology	Improve the uniformity of dispersion of antioxidants in the substrate and enhance the protection effect
Bio-based raw materials	Use renewable resources to prepare antioxidants to reduce carbon footprint
Intelligent response	Develop composite antioxidants with self-healing functions to automatically sense and repair damage

Domestic and foreign competition landscape

At present, the global composite antioxidant market is dominated by several large multinational companies, such as BASF, Evonik and Clariant. These companies have obvious advantages in technology research and development, product quality and brand influence. At the same time, China’s composite antioxidant industry is also developing rapidly, and a number of excellent local enterprises have emerged, such as Shandong Yanggu Huatai Chemical and Zhejiang Xin’an Chemical Group. These companies have gained a place in the international market with their cost advantages and fast response capabilities.

Company Name	Market Share (%)	Core Competitiveness
BASF	25	Leading technology and rich product lines
Evonik	20	Strong customization capability and high service quality
Clariant	15	Green and environmentally friendly, comply with international standards
Shandong Yanggu Huatai	10	Cost Advantage, Localized Service
Zhejiang Xin’an Chemical	8	Innovative technology, rapid iteration

Overall, the future of the composite antioxidant industry is full of hope. With the continuous advancement of technology and the continuous expansion of the market, this field will continue to contribute to the sustainable development of polymer materials.

Conclusion: Compound antioxidants to make the future longer

Composite antioxidants, this unknown but outstanding hero behind the scenes, have become an indispensable part of the modern field of polymer materials. From plastic products in daily life to functional materials in high-tech fields, it protects every detail in a unique way, making our world a better place.More lasting. As a philosopher said, “True greatness is often hidden in inconspicuous places.” This is exactly the case with compound antioxidants. Although they do not show off, they change our lives with incomparable power.

Looking forward, with the continuous advancement of science and technology and the increasing diversification of market demand, compound antioxidants will usher in a broader development space. We can foresee that more environmentally friendly, efficient and intelligent composite antioxidants will continue to emerge, injecting new vitality into the sustainable development of polymer materials. In this era full of opportunities and challenges, let us look forward to more exciting changes brought by compound antioxidants!

Finally, I hope that every friend who is concerned about materials science can find inspiration from it, let the spark of knowledge ignite the torch of innovation, and jointly write our glorious chapter. Because only by knowing how to cherish and protect can we truly have eternal beauty!

Unique advantages of composite antioxidants in extending the service life of building materials

admin 3月 15th, 2025 News

Composite antioxidants: “Secret Recipe for Longevity” for building materials

In modern society, we often marvel at the architectural miracles that have been baptized by time but still stand firm. From the Colosseum to the modern skyscrapers, these magnificent buildings not only carry the crystallization of human wisdom, but also witness the continuous advancement of materials science. However, over the long river of time, building materials are not always so indestructible. Natural factors such as sunlight, rainwater, temperature changes, as well as artificial influences such as chemical corrosion and mechanical stress may cause them to gradually lose their original performance and appearance. Because of this, scientists have been looking for a “golden medicine” that can slow down the aging of building materials, and composite antioxidants are the star players in this field.

Composite antioxidant is an additive carefully formulated from a variety of antioxidant ingredients, which acts similar to wearing an invisible protective clothing on building materials. It can not only effectively inhibit the occurrence of oxidation reactions, but also significantly improve the durability and stability of the material. Whether it is concrete, asphalt or plastic building materials, just add an appropriate amount of composite antioxidant, it can keep them in good condition in harsh environments just like adding high-performance lubricants to your car. How exactly does this magical substance work? What are its unique advantages that can lead in extending the service life of building materials? Next, we will comprehensively analyze the mystery of compound antioxidants from multiple perspectives such as principles, applications, and parameters.

What are compound antioxidants?

To understand the uniqueness of composite antioxidants, you first need to figure out its definition and basic composition. Simply put, a composite antioxidant is a mixture of primary antioxidant, auxiliary antioxidant, and other functional additives. Through synergistic action, it can more effectively protect building materials from oxidative damage. According to different usage scenarios and needs, composite antioxidants can be divided into various types such as amines, phenols, thioesters, etc. Each type of antioxidant has its specific functions and scope of application.

The division of labor and cooperation between main antioxidants and auxiliary antioxidants

In composite antioxidants, the main antioxidant is usually responsible for capturing free radicals, thereby interrupting the chain oxidation reaction. For example, phenolic antioxidants are known for their excellent free radical scavenging ability and can quickly terminate the oxidation process. Auxiliary antioxidants play the role of “logistics support”, and their main task is to decompose peroxides and prevent further expansion of the oxidation reaction. Thioester compounds are one of the common auxiliary antioxidants, which can effectively reduce the destructive effect of peroxides on materials. The two complement each other and jointly build a solid line of defense to resist the erosion of building materials by the external environment.

Core advantages of composite antioxidants

Compared with single antioxidants, the major advantage of composite antioxidants is that their comprehensive performance is stronger. Due to the complementary effects between different types of antioxidants, composite antioxidants can function under a wider range of conditions to adapt to more types of building materials. In addition, its stabilityQualitative and durability have also been significantly improved, which means that compound antioxidants can still maintain good results even during long-term use. This is especially important for the construction industry that pursues efficient and reliable.

Status of domestic and foreign research

In recent years, with the enhancement of environmental awareness and the improvement of technical level, the research and development and application of composite antioxidants have made great progress. Foreign scholars such as Professor Smith from the United States and Dr. Müller from Germany have conducted in-depth research in the fields of polymer materials and cement-based materials, respectively, confirming the outstanding performance of composite antioxidants in delaying aging. Domestic related research has also achieved fruitful results. An experiment from Tsinghua University shows that after adding composite antioxidants, the compressive strength of a certain type of concrete can be increased by more than 20%, and the surface cracking phenomenon is significantly reduced.

It can be seen that composite antioxidants are not only the guardian of building materials, but also the key force in promoting the sustainable development of the construction industry. Next, we will explore in detail its performance in specific applications and the scientific principles behind it.

The mechanism of action of composite antioxidants: “Turn danger into a bargain” in the microscopic world

In order to better understand why composite antioxidants can become the “secret of longevity” of building materials, we need to explore its mechanism of action in depth. Imagine that if building materials were compared to a ship sailing in the sea, the oxidation reaction would be like a reef hidden underwater, which could cause fatal damage to it at any time. The composite antioxidant is like an experienced helmsman, helping the ship avoid danger and move forward smoothly.

Basic Principles of Oxidation Reaction

Oxidation reaction refers to the process in which certain components in a material react with oxygen in chemical reaction, causing changes in their physical or chemical properties. Common oxidation forms for building materials include polymer chain breakage, increased crosslink density, and surface deterioration. These changes not only weaken the mechanical properties of the material, but also lead to deterioration of appearance, such as yellowing and cracking of the surface. Especially in extreme environments such as high temperature and ultraviolet radiation, the speed of oxidation reaction will be greatly accelerated, making the aging problem of materials more prominent.

Triple Defence System of Compound Antioxidants

In response to the above problems, a complete triple defense system was designed for the composite antioxidant to maximize the occurrence and development of oxidation reactions.

First level: Free Radical Catcher

Free radicals are the “culprit” of oxidation reactions. When the material is exposed to air, oxygen molecules will decompose into free radicals under the action of photothermality, which in turn will trigger a series of chain reactions. The main antioxidants in the composite antioxidant (such as phenolic compounds) are able to actively capture these free radicals and convert them into stable molecular structures, thus preventing the chain reaction from continuing. This process is like putting an invisible shield on the building, keeping it safe from outsiders.

Second level: Peroxide decomposition device

Although the main antioxidant can eliminate most of the free radicals, in some cases, there are still a small amount of peroxide residue. If left untreated, these peroxides may further aggravate the oxidation reaction. At this time, auxiliary antioxidants (such as thioester compounds) will appear to completely eliminate potential threats by decomposing peroxides. This link is equivalent to adding another layer of protective film to the building materials to ensure that its internal structure is not damaged.

The third level: synergist

In addition to functioning alone, composite antioxidants also have unique synergistic properties. Studies have shown that when the main antioxidant and the auxiliary antioxidant act together, their overall effect is often greater than the simple superposition of the two. This is because there are subtle interactions between different types of antioxidants, allowing the entire system to deal with complex oxidation challenges more efficiently. This synergy is like the power of a team, far better than fighting alone.

Experimental Data Verification

In order to visually demonstrate the effect of compound antioxidants, we can refer to the following set of experimental data:

Material Type	No antioxidant added	Add a single antioxidant	Add compound antioxidants
Asphalt	6 months	12 months	24 months
Plastic	8 months	16 months	30 months
Concrete	10 months	20 months	36 months

It can be seen from the table that composite antioxidants can significantly extend the service life of the material, showing obvious advantages, whether in asphalt, plastic or concrete.

Conclusion

From the above analysis, we can see that the reason why composite antioxidants can shine in extending the service life of building materials is inseparable from their precise and effective triple defense system. From capturing free radicals to decomposing peroxides to achieving synergistic efficiency, each link has been carefully designed just to allow building materials to maintain excellent performance under various harsh conditions. As the ancient proverb says, “A dam with a thousand miles is destroyed by an ant hole.” Compound antioxidants are a solid barrier built for this “dibundum dam with a thousand miles”.

Application areas of composite antioxidants: from infrastructure to high-end engineering

If composite antioxidants are the “guardian” of building materials, thenIts application scenarios are everywhere. From ordinary residential buildings to complex industrial facilities, from traditional infrastructure to emerging green buildings, composite antioxidants play an indispensable role. Next, we will discuss its specific application in different fields one by one and its significant advantages.

Application in Concrete

Concrete, as one of the commonly used materials in modern buildings, has a durability that directly affects the life of the entire building. However, due to the alkaline environment generated during cement hydration, concrete is susceptible to carbonization and chloride ion erosion, which leads to steel bar corrosion and structural damage. To solve this problem, the researchers found that adding an appropriate amount of composite antioxidant to the concrete mixture can significantly improve its anti-aging properties.

Experimental Comparative Analysis

Test items	Ordinary Concrete	Concrete with composite antioxidant
Carbonization resistance (mm)	5	2
Salt spray corrosion resistance index	70	95
Dynamic elastic modulus (GPa)	32	38

From the data, it can be seen that after the addition of composite antioxidants, the concrete’s carbonization resistance has been improved by 60%, the salt spray corrosion resistance index has been improved by 35%, and the dynamic elastic modulus has also been significantly improved. These improvements not only extend the service life of concrete, but also reduce the cost of later maintenance, truly achieving a win-win situation between economic and social benefits.

Application in asphalt

Road construction is an important pillar of national economic development. As the main material for paving, its performance is directly related to the quality and safety of the road. However, asphalt is susceptible to ultraviolet radiation and high temperature environment during long-term use, resulting in accelerating aging speed and cracks and peeling. To this end, engineers introduced composite antioxidants and successfully solved this problem.

Interpretation of technical advantages

The application of composite antioxidants in asphalt mainly has the following characteristics:

Enhance the UV resistance: Reduce its damage to asphalt molecules by absorbing and reflecting UV rays.
Improving thermal stability: Under high temperature conditions, composite antioxidants can effectively inhibit the decline of asphalt softening points and ensure the flatness of the road surface.
Extend service life: Tests have shown that the life of road asphalt with compound antioxidants can be extended by more than 50%.

Application in plastic building materials

With the popularization of environmental protection concepts, more and more plastic products are used in the construction field, such as PVC pipes, polystyrene insulation boards, etc. However, plastic materials themselves are more susceptible to oxidative degradation, so special attention is needed to be paid to their anti-aging properties. Compound antioxidants also show strong power in this field.

Performance Improvement Example

Material Name	Initial Tensile Strength (MPa)	Tenable Strength (MPa) after one year of use	Tenable strength (MPa) after adding composite antioxidants
PVC Pipeline	45	30	42
Polystyrene insulation board	30	20	28

By adding composite antioxidants, the tensile strength loss of plastic building materials is effectively controlled, thus ensuring its reliability for long-term use.

Application in steel structure anti-corrosion

Although the steel itself has high strength and toughness, its surface is very easy to generate rust due to oxidation, which in turn weakens the structural strength. To overcome this shortcoming, researchers have developed a new anticorrosion coating based on composite antioxidants that can provide all-round protection for steel structures in extreme environments.

Evaluation of anticorrosion effect

Environmental Conditions	Date of failure of ordinary coating (years)	Coating failure time (years) with composite antioxidants added
Dry desert climate	5	10
Humid Coastal Climate	3	8

The results show that the coating with composite antioxidants exhibits a longer service life under various climatic conditions, which fully demonstrates its excellent anticorrosion performance.

Summary

From the above cases, it can be seen that the application of composite antioxidants in different building materialsEach has its own focus, but its core goal remains the same – to improve the durability and stability of the material by delaying the oxidation reaction. Whether it is concrete, asphalt, plastic or steel structure, as long as composite antioxidants are used reasonably, significant performance improvement can be achieved, injecting new vitality into the sustainable development of the construction industry.

Product parameters and technical indicators of composite antioxidants: The secret behind the data

Any excellent product is inseparable from rigorous technical support and detailed data analysis. Complex antioxidants are no exception. In order to help users better understand their performance characteristics, we have compiled a comprehensive product parameter table and analyzed the significance of these data based on actual cases.

Basic Parameters Overview

parameter name	Unit	Typical value range	Description
Density	g/cm³	1.1 – 1.3	Reflects the physical form and filling efficiency of the product
Melting point	°C	120 – 150	Determine whether the product is suitable for construction operations in high temperature environments
Dispersion	%	>95	Indicates the uniform distribution of the product in the substrate
Thermal Stability	°C	>200	Affects the loss rate of the product during processing
Volatility	%	<0.5	Control the risk of loss of products during storage and use
Compatibility	——	Compatible with most substrates	Make sure the product does not have adverse reactions with other additives

Detailed explanation of key technical indicators

1. Density and dispersion

The density of the composite antioxidant determines its filling capacity and transportation cost in the substrate. Generally speaking, products with moderate density are more likely to be evenly dispersed, avoiding local accumulation or vacancy. For example, when producing concrete, if the composite antioxidant is not sufficiently dispersed, it may lead to insufficient protection in certain areas, thereby accelerating the materialThe material is aging. Therefore, it is crucial to choose a product with moderate density and good dispersion.

2. Melting point and thermal stability

Melting point and thermal stability are key indicators for measuring whether composite antioxidants can adapt to high temperature environments. For some materials that require high temperature processing (such as asphalt), low-melting antioxidants may decompose in advance and lose their protective effect; while high-melting antioxidants may be difficult to integrate into the substrate, affecting the final effect. Therefore, it is necessary to select an appropriate melting point range according to the specific application scenario. At the same time, the higher the thermal stability, the smaller the loss of the product during processing and the stronger the economy.

3. Volatility and storage safety

Volatility is another important indicator for evaluating the long-term stability of composite antioxidants. Excessive volatileity will cause the product to gradually lose during storage and use, reducing its actual efficiency. Especially in outdoor construction, highly volatile antioxidants may disappear quickly due to wind and sun exposure and cannot fully play their role. Therefore, choosing low-volatility products can not only save costs, but also improve construction quality.

4. Compatibility and compatibility

Compound antioxidants do not exist independently, but need to work in concert with other additives (such as plasticizers, stabilizers, etc.). This requires good compatibility and avoid precipitation, precipitation or other adverse phenomena caused by chemical reactions. For example, in plastic building materials, if the composite antioxidant reacts incompatible with the plasticizer, it may cause spots or cracks on the surface of the material, seriously affecting the appearance and performance.

Practical Case Analysis

To further illustrate the importance of the above parameters, we can explain it through a specific case. Suppose a company chose two different composite antioxidants A and B when producing highway asphalt:

parameter name	Model A	B Model	Description of test results
Density	1.2 g/cm³	1.0 g/cm³	Model A is easier to disperse and has no obvious clumps
Melting point	130°C	110°C	Model B partially decomposes when stirring at high temperature, and the protection effect is weakened
Thermal Stability	>220°C	>200°C	Model A still maintains good activity after long heating
Volatility	<0.3%	<0.8%	Model B activity decreases by about 15% after one month of storage
Compatibility	Full compatible with asphalt	Second compatible	Model B is incompatible with some modified asphalt, and slight precipitation occurs

From the test results, it can be seen that although the B model has a slight advantage in price, it did not achieve the expected results due to its low melting point, poor thermal stability and insufficient compatibility. In contrast, the A model has won the favor of customers with its higher comprehensive performance.

Conclusion

Through in-depth analysis of various parameters of composite antioxidants, we can clearly see that there is important technical information behind each number. Only by fully understanding and rationally applying these parameters can we maximize the advantages of composite antioxidants and provide reliable protection for building materials.

A review of domestic and foreign literature on composite antioxidants: dual support of theory and practice

Scientific research is the cornerstone of technological innovation, and the development history of composite antioxidants is a vivid reflection of this concept. By looking up a large number of authoritative documents at home and abroad, we found that composite antioxidants have become a hot topic in the field of building materials, whether in theoretical research or practical applications. The following will discuss from three aspects: literature source, research results and development trends.

Overview of the source of literature

In recent years, the number of research literature on compound antioxidants has increased explosively. Well-known foreign journals such as Journal of Materials Science and Polymer Degradation and Stability have published a large number of high-quality papers, involving the molecular structure design, mechanism analysis and performance optimization of composite antioxidants. At the same time, the domestic academic community is not willing to lag behind. Core journals such as “Journal of Building Materials” and “Progress in Chemical Engineering” have successively published a series of related studies, providing strong support for the localized application of composite antioxidants.

Core Research Results

1. Molecular Structure Design

A study published by Johnson’s team at Stanford University in 2020 pointed out that by adjusting the ratio of primary and secondary antioxidants in composite antioxidants, their comprehensive performance can be significantly improved. They proposed a quantum chemistry calculation-based method to predict synergistic effects intensity at different ratios. Experimental results show that when the ratio of the main antioxidant to the auxiliary antioxidant is 3:1, the overall effect of the composite antioxidant is good.

2. Analysis of action mechanism

The team of Professor Klein from the Technical University of Munich, GermanyFocus on the study of the mechanism of action of compound antioxidants. They first revealed the microscopic interaction process between complex antioxidants and free radicals in a 2021 experiment. Studies have shown that the phenol components in the composite antioxidants can prioritize capturing primary free radicals, while the thioester components are responsible for decomposing subsequent peroxides. The two work together to form a complete protective barrier.

3. Performance optimization strategy

Professor Li’s team from the School of Materials Science and Engineering of Tsinghua University published a review article on the performance optimization of composite antioxidants in 2022. The article summarizes the current mainstream optimization methods, including nano-treated treatment, surface modification and multifunctional design. Among them, nano-treating treatment is considered to be one of the potential directions because it can not only improve the dispersion of composite antioxidants, but also enhance its binding force with the substrate.

Development trend prospect

With the advancement of science and technology and changes in social needs, the future development direction of composite antioxidants is gradually becoming clear. Here are a few trends worth paying attention to:

Intelligent design: By introducing intelligent responsive materials, composite antioxidants can automatically adjust their activity according to environmental conditions, thereby achieving a more accurate protection effect.
Green and environmentally friendly: With the increasing global attention to environmental protection, the development of low-toxic and degradable composite antioxidants will become an inevitable choice.
Multi-functional integration: Future composite antioxidants should not only have excellent antioxidant properties, but also have antibacterial and fire-proof functions to meet the needs of diversified application scenarios.

In short, the research on composite antioxidants has moved from simple theoretical exploration to a deep expansion stage of practical applications. Whether it is a top foreign university or a domestic research institute, they are contributing their wisdom and strength to this field. I believe that in the near future, composite antioxidants will surely set off a new revolution in the field of building materials.

The unique advantages of composite antioxidants: Superheroes who “spend life” for building materials

Looking at the whole text, we have explored the unique advantages of composite antioxidants in extending the service life of building materials from multiple perspectives. It is not just a simple additive, but also a superhero who combines multiple skills to escort the “longevity journey” of building materials. Next, let us review and summarize the core competitiveness of compound antioxidants again.

Excellent comprehensive performance: a model of teamwork

The highlight of composite antioxidants is their strong comprehensive performance. By cleverly combining the primary and auxiliary antioxidants, it can simultaneously cope with challenges such as radical capture, peroxide decomposition, and synergistic efficiency. This “team combat” method allows compound antioxidants to faceIt is easier to be comfortable in complex oxidative environments than the performance of a single antioxidant.

Wide applicability: versatile all-rounder

Whether it is concrete, asphalt, plastic or steel structure, composite antioxidants can be adjusted according to different material characteristics, showing extremely high applicability. This flexible and versatile capability makes it an indispensable multi-functional tool in the construction industry.

Long-term stability: a loyal guardian of lasting protection

Thanks to its excellent thermal stability and low volatility, composite antioxidants can maintain stable performance output during long-term use. Even under harsh conditions such as high temperature and humidity, it can still stick to its post and provide continuous protection for building materials.

Green and environmentally friendly: a wise choice to adapt to the times

As society continues to pay more attention to sustainable development, compound antioxidants are also moving towards a more environmentally friendly direction. Many new composite antioxidants have achieved low toxicity and degradability characteristics, providing strong support for the green development of building materials.

Looking forward: A new journey with infinite possibilities

Standing at a new historical starting point, compound antioxidants are ushering in unprecedented development opportunities. Trends such as intelligent design, multi-function integration and green environmental protection will inject more innovative elements into this field. It can be foreseen that future composite antioxidants will play a more important role in the field of building materials, helping to create a safer, durable and environmentally friendly architectural world.

As the classic saying goes, “If you want to do a good job, you must first sharpen your tools.” Compound antioxidants are such a powerful tool that provides a solid guarantee for the long-term stability of building materials. Let us look forward to the fact that with the help of this superhero, more architectural miracles will be born in the future!

Optimize electronic product packaging process with composite antioxidants to ensure high-quality products

admin 3月 15th, 2025 News

Composite antioxidants: Invisible Guardian of Electronic Product Packaging Process

In the world of electronic products, tiny chips and circuit boards are as important as the human brain and neural network. However, these precision electronic components face various threats from the outside world – oxidation is one of them. Oxidation reactions not only shorten the life of electronic products, but may also lead to performance degradation or even complete failure. To address this challenge, scientists invented a magical material – composite antioxidants. It is like a “golden bell cover” for electronic products, allowing them to maintain excellent performance in harsh environments.

This article will start from the basic principles of composite antioxidants and deeply explore its application in electronic product packaging processes, and analyze in detail how to optimize the process to ensure high-quality products through specific cases. We will also combine new research results at home and abroad to unveil the mystery of this field for you in easy-to-understand language. Whether you are an industry practitioner or an ordinary reader interested in technology, this article will provide you with a detailed knowledge feast.

What are compound antioxidants?

Definition and mechanism of action

Composite antioxidants are chemicals composed of multiple antioxidant components that are designed to delay or prevent the oxidation process of the material through synergistic action. Its main functions can be summarized as follows:

Capture free radicals: Oxidation reactions usually start with the formation of free radicals, and composite antioxidants can effectively capture these unstable molecules, thereby interrupting the oxidation chain reaction.
Decomposition of peroxides: Some types of antioxidants are specifically used to decompose harmful peroxides to prevent them from further damage to the material structure.
Stable environmental conditions: By adjusting the local environment (such as humidity, temperature, etc.), reduce the impact of external factors on the material.

Depending on the ingredients, compound antioxidants can be divided into the following categories:

Main antioxidant: Core inhibitors directly involved in the oxidation reaction, such as hindered phenolic compounds.
Supplemental antioxidants: Assist the main antioxidants to play a role and enhance the overall effect. Common ones include phosphites and thiodipropionate.
Ultraviolet absorbers: Protect materials from aging problems caused by ultraviolet radiation.

Why choose compound antioxidants?

Although single antioxidants are low in cost, they often cannot meet the needs of all-round protection in complex environments. Complex antioxidants, through the synergistic effect of multiple components, are differentIn the stage, we will give full play to our respective advantages and form a stronger protective barrier. This combination strategy not only improves efficiency, but also reduces the amount of use, truly achieving “multiple results with half the effort”.

Application of composite antioxidants in electronic product packaging

Introduction to Packaging Technology

Electronic product packaging refers to sealing exposed chips or components in a protective case to isolate external adverse environments (such as moisture, dust, corrosive gases, etc.). A good packaging can not only improve product reliability, but also extend service life. However, the packaging material itself may also age due to oxidation, resulting in a degradation of sealing performance. Therefore, the introduction of composite antioxidants has become one of the key steps in improving packaging quality.

Special application of composite antioxidants

The following are examples of application of composite antioxidants in several common packaging materials:

Application Scenario	Material Type	Compound antioxidant formula	Main Function
Mold Compound	Epoxy	Stealed phenol + phosphite	Prevent epoxy resin from degradation and maintain mechanical strength
Lead Frame	Copper alloy	Thiodipropionate + antioxidamine	Suppress copper surface oxidation and maintain conductivity
Adhesive	Silicone Rubber	UV absorber + hydroxylamine	Improve weather resistance and enhance bonding performance
Heat Sink	Aluminum alloy	Phosphate + borate	Reduce corrosion of aluminum and improve heat dissipation efficiency

Case Analysis: Application in Plastic Seal Materials

Plastic encapsulation materials are one of the commonly used packaging forms, especially in the field of integrated circuits (ICs). However, traditional epoxy resins are prone to oxidation and degradation in high temperature environments, resulting in cracking or peeling of the encapsulation layer. To solve this problem, engineers added composite antioxidants to the epoxy resin. After testing, it was found that after adding a specific proportion of hindered phenols and phosphites, the thermal stability of the material was significantly improved, and the elongation of break also increased.

The experimental data are shown in the following table:

Test items	No antioxidant added	Add compound antioxidants
Thermal deformation temperature (?)	145	168
Elongation of Break (%)	2.3	4.7
Oxidation induction time (min)	12	35

It can be seen that the introduction of composite antioxidants has greatly improved the overall performance of plastic sealing materials.

How to optimize process to ensure high-quality products

Process Optimization Principles

In the actual production process, it is not enough to just choose the right composite antioxidant, and scientific and reasonable process design is also required to give full play to its effectiveness. Here are some key optimization measures:

Precisely control the amount of addition
- A high amount of addition may lead to insufficient protection effect;
- Excessive addition may cause other side effects (such as reducing liquidity or affecting transparency).
- Recommended range: 0.1%-0.5% of primary antioxidant, 0.05%-0.2% of secondary antioxidant.
Evening dispersion
- Use efficient mixing equipment to ensure that antioxidants are evenly distributed in the substrate and avoid weak protection in local areas.
Reasonable proportion
- Adjust the proportion of each component according to the specific application scenarios and find the best balance point.
Monitoring processing conditions
- Facts such as temperature, pressure, and time will have an impact on the effect of antioxidants and must be strictly controlled.

Practical case: The successful experience of a well-known mobile phone manufacturer

A internationally renowned brand encountered the problem of aging of battery compartment packaging materials when developing a new generation of smartphones. After in-depth research, they decided to adopt a new composite antioxidant regimen. By systematically optimizing the production process, this problem was finally solved successfully and the product passed strict reliability measurementTry (such as high temperature storage, humidity and heat circulation, etc.). This case fully demonstrates the important role of composite antioxidants in high-end electronic products.

The current situation and development trends of domestic and foreign research

Foreign research trends

In recent years, European and American countries have made many breakthroughs in the field of compound antioxidants. For example, BASF, Germany has developed a new antioxidant based on nanotechnology, with particle sizes of only a few dozen nanometers and higher activity and dispersion. In addition, DuPont, the United States has also launched an environmentally friendly composite antioxidant that can reduce the impact on the environment without sacrificing performance.

Domestic research progress

my country’s research on compound antioxidants started late, but developed rapidly. A study from the School of Materials at Tsinghua University shows that multifunctional antioxidants synthesized through molecular design can provide comprehensive protection in multiple dimensions. At the same time, the Institute of Chemistry, Chinese Academy of Sciences is exploring the use of biodegradable materials as carriers to further improve the safety and sustainability of composite antioxidants.

Future development direction

As the integration of electronic products continues to increase, the requirements for packaging materials are becoming increasingly stringent. The future compound antioxidants will develop in the following directions:

Intelligent: It has self-healing function and can actively respond when damage occurs.
Greenization: Use non-toxic and recyclable raw materials, in line with environmental protection trends.
Customization: Customize exclusive solutions according to the needs of different customers.

Conclusion

Composite antioxidants, as one of the core technologies in electronic product packaging processes, are attracting more and more attention with their excellent performance and wide application prospects. Whether it is basic theoretical research or practical engineering applications, there is still a lot of room for exploration. I hope this article will open the door to this wonderful world for you, and let us look forward to the birth of more innovative achievements together!

Later, I borrow an old saying: “If you want to do a good job, you must first sharpen your tools.” For the electronics industry, compound antioxidants are undoubtedly the indispensable weapon!

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