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An antioxidant for polymers
2018-1-15 12:08:44
An antioxidant for polymers
In order to prolong the life of polymer materials, inhibit or delay the oxidative degradation of the polymer, it is usually used as an antioxidant. The so-called antioxidants in polymer materials are substances that can reduce the automatic oxidation of high polymer materials (in the rubber industry). Antioxidants are called antioxidants.
The antioxidants in polymer materials are used in addition to plastics and rubber. It is also widely used in oil, grease and food industries.
The antioxidants of high polymer materials are different according to their chemical structure. They can be classified into amine, phenol, sulfur-containing compound, phosphorous compound, organic metal salts, etc. Amines are mainly used in the rubber industry. Among them, the production of phenylenediamine and ketone amine was the largest.
Phenolic antioxidants are mainly blocked phenols, whose growth rate is higher than that of amines. Mainly used in plastics and light color rubber. Amine antioxidants and phenolic antioxidants are the main antioxidants. Sulfur and phosphate-based antioxidants are auxiliary antioxidants, such as phenolic antioxidants, and can produce synergies, mainly for polyolefin.
Thermal oxygen aging of polymers and classification of antioxidants. The plastic aging of light, thermal stress and metal ions is called thermal oxygen aging. The aging process caused by these different inducements is basically the same, namely, the chain reaction process of the combination of non-radical reaction and free radical reaction.
In the process of chain reaction, as long as the source of stem or capture (eliminate) chain reaction in the middle of the product))) of oxygen free radicals, hydrogen peroxide or carbon free radicals can stop or slow down the aging process of plastic.. According to the different function, the antioxidant can be divided into three types.
(1) main antioxidant. The main antioxidant is also called free radical scavenger. It is one of the main functions of antioxidants. It can capture the oxygen-containing free radicals (#OH, RO#, ROO#) and carbon free radicals (but less effective) that are produced during the thermal oxidation of the polymer, thereby halting or slowing down the thermal oxygen aging of the polymer.
(2) auxiliary antioxidants. Auxiliary antioxidants are also known as hydroperoxides. It is a class of polymer hydrogen peroxide that can be generated in the thermal oxidative aging chain reaction to produce a compound that loses its activity, thereby terminating or slowing down the agent of thermal oxygen aging. Because it has a synergistic effect with the main antioxidant, it can only exert the maximum effect when combined with the main antioxidant, so it is known as the auxiliary antioxidant.
(3) carbon free radical scavenger. Carbon free radicals (alkyl radicals) are usually generated in the chain reaction of thermal oxidation aging, and are often produced in the absence of oxygen and high temperature. With the increasing use of engineering plastics. There is also a growing number of occasions for processing at high temperatures, which is based on the recent commercialization of such antioxidants.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Polymer materials, also known as polymer materials, are made of macromolecular compounds and other additives (auxiliaries).
The polymer material is divided into rubber, fiber, plastic, polymer adhesives, polymer coatings and polymer matrix composites.
Rubber is a kind of linear flexible polymer. Its molecular chains are small in price and flexible in molecular chain, which can produce large deformation under external force, and can be recovered quickly after removing external forces. There are two kinds of natural rubber and synthetic rubber.
Fiber is divided into natural fibers and chemical fibers. The former refers to silk, cotton, flax, hair, etc. The latter is made of natural macromolecule or synthetic polymer, which is made by spinning and reprocessing. The secondary valence of fiber is large, the deformation ability is small, the modulus is high, generally is crystalline polymer.
Plastics are made of synthetic resin or chemically modified natural polymers, and added with fillers, plasticizers and other additives. The intermolecular valence force, modulus and shape variables are between the rubber and the fiber. According to the properties of synthetic resin, thermosetting plastic and thermoplastic plastics are usually classified. It is also divided into general plastic and engineering plastics.
Polymer adhesive is a kind of adhesive material which is mainly composed of synthetic natural polymer compounds. There are two kinds of natural and synthetic adhesives. The application of more is synthetic adhesive.
Polymer coatings are made of polymer as the main forming material, adding solvents and various additives. It is divided into oil coating, natural resin coating and synthetic resin coating.
Macromolecular composite is a kind of composite material which is made of polymer compound. It combines the performance characteristics of the original materials and can design the materials according to the requirements. Polymer composites are also known as polymer modification, which can be modified into molecular modification and blending modification.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In order to prolong the life of polymer materials, inhibit or delay the oxidative degradation of the polymer, it is usually used as an antioxidant. The so-called antioxidants in polymer materials are substances that can reduce the automatic oxidation of high polymer materials (in the rubber industry). Antioxidants are called antioxidants.
The antioxidants in polymer materials are used in addition to plastics and rubber. It is also widely used in oil, grease and food industries.
The antioxidants of high polymer materials are different according to their chemical structure. They can be classified into amine, phenol, sulfur-containing compound, phosphorous compound, organic metal salts, etc. Amines are mainly used in the rubber industry. Among them, the production of phenylenediamine and ketone amine was the largest.
Phenolic antioxidants are mainly blocked phenols, whose growth rate is higher than that of amines. Mainly used in plastics and light color rubber. Amine antioxidants and phenolic antioxidants are the main antioxidants. Sulfur and phosphate-based antioxidants are auxiliary antioxidants, such as phenolic antioxidants, and can produce synergies, mainly for polyolefin.
Thermal oxygen aging of polymers and classification of antioxidants. The plastic aging of light, thermal stress and metal ions is called thermal oxygen aging. The aging process caused by these different inducements is basically the same, namely, the chain reaction process of the combination of non-radical reaction and free radical reaction.
In the process of chain reaction, as long as the source of stem or capture (eliminate) chain reaction in the middle of the product))) of oxygen free radicals, hydrogen peroxide or carbon free radicals can stop or slow down the aging process of plastic.. According to the different function, the antioxidant can be divided into three types.
(1) main antioxidant. The main antioxidant is also called free radical scavenger. It is one of the main functions of antioxidants. It can capture the oxygen-containing free radicals (#OH, RO#, ROO#) and carbon free radicals (but less effective) that are produced during the thermal oxidation of the polymer, thereby halting or slowing down the thermal oxygen aging of the polymer.
(2) auxiliary antioxidants. Auxiliary antioxidants are also known as hydroperoxides. It is a class of polymer hydrogen peroxide that can be generated in the thermal oxidative aging chain reaction to produce a compound that loses its activity, thereby terminating or slowing down the agent of thermal oxygen aging. Because it has a synergistic effect with the main antioxidant, it can only exert the maximum effect when combined with the main antioxidant, so it is known as the auxiliary antioxidant.
(3) carbon free radical scavenger. Carbon free radicals (alkyl radicals) are usually generated in the chain reaction of thermal oxidation aging, and are often produced in the absence of oxygen and high temperature. With the increasing use of engineering plastics. There is also a growing number of occasions for processing at high temperatures, which is based on the recent commercialization of such antioxidants.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Polymer materials, also known as polymer materials, are made of macromolecular compounds and other additives (auxiliaries).
The polymer material is divided into rubber, fiber, plastic, polymer adhesives, polymer coatings and polymer matrix composites.
Rubber is a kind of linear flexible polymer. Its molecular chains are small in price and flexible in molecular chain, which can produce large deformation under external force, and can be recovered quickly after removing external forces. There are two kinds of natural rubber and synthetic rubber.
Fiber is divided into natural fibers and chemical fibers. The former refers to silk, cotton, flax, hair, etc. The latter is made of natural macromolecule or synthetic polymer, which is made by spinning and reprocessing. The secondary valence of fiber is large, the deformation ability is small, the modulus is high, generally is crystalline polymer.
Plastics are made of synthetic resin or chemically modified natural polymers, and added with fillers, plasticizers and other additives. The intermolecular valence force, modulus and shape variables are between the rubber and the fiber. According to the properties of synthetic resin, thermosetting plastic and thermoplastic plastics are usually classified. It is also divided into general plastic and engineering plastics.
Polymer adhesive is a kind of adhesive material which is mainly composed of synthetic natural polymer compounds. There are two kinds of natural and synthetic adhesives. The application of more is synthetic adhesive.
Polymer coatings are made of polymer as the main forming material, adding solvents and various additives. It is divided into oil coating, natural resin coating and synthetic resin coating.
Macromolecular composite is a kind of composite material which is made of polymer compound. It combines the performance characteristics of the original materials and can design the materials according to the requirements. Polymer composites are also known as polymer modification, which can be modified into molecular modification and blending modification.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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