News Details
PVC/ABS alloy antioxidant
2018-1-12 11:39:04
PVC/ABS alloy antioxidant
PVC is one of the most widely used plastic materials, but it has poor impact resistance, thermal stability and poor processing mobility. ABS is a kind of plastic material with excellent performance and versatility, which has good characteristics of high impact strength, good heat resistance, stable dimension and easy to form and processing.
It can not only improve the processing performance of PVC, but also improve the mechanical properties of PVC, so that the impact strength of PVC/ABS alloy is greater than that of ABS and PVC.
But ABS weather is bad, in the process of storage, processing and using structure changes along with the extension of time, the mechanical properties degradation, become hard and brittle materials, the main reason is that ABS molecular butadiene contained in the double bond in the outdoor sunlight, heat, oxygen and the effect of oxidative degradation.
Moreover, in PVC/ABS alloy, the degradation of ABS will accelerate the degradation of PVC, and the interaction between them makes the weatherability of PVC/ABS alloy worse. Therefore, it is of great practical significance to research and develop the excellent mechanical properties and good weatherability of PVC/ABS alloy, which is of great practical significance for the full play of the use value of the alloy and the development of new plastic varieties.
In 90 ℃ heat aging box, PVC/ABS alloy antioxidants can obviously improve the heat performance of PVC/ABC, varieties of different antioxidants on the improvement of PVC/ABC heat resistance level is different, of which 1076 best; Add PVC/ABS alloy antioxidants are higher than that of blank sample, mechanical performance of the initial sample of PVC/ABS alloy antioxidants not only improves the heat oxygen aging performance of PVC/ABC use process, and to improve the machining process of PVC/ABS thermal oxidation performance.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
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.
During the 120 days of natural exposure, the tensile strength and impact strength of the blank samples decreased greatly. In addition, PVC/ABS samples with ultraviolet absorbent were tested, and the tensile strength and impact strength decreased, and the UV resistance improved, and UV - 327 was the best.
PVC for amorphous structure of white powder, branched degree is small, relative density 1.4, glass transition temperature of 77 ~ 90 ℃, 170 ℃ or so starts to break down , the poor stability to heat and light, in more than 100 ℃ or the sun for a long time, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, cause discoloration, physical and mechanical properties also fell rapidly, must be added in the practical application of stabilizers in order to improve the stability of heat and light.
The PVC molecular weight of industrial production is generally within the range of 50,000 ~ 110,000, with a large amount of dispersibility, and the molecular weight increases with the decrease of polymerization temperature. No fixed melting point, 80 ~ 85 ℃ began to soften, 130 ℃ is a viscoelastic state, 160 ~ 180 ℃ began to change for the viscous flow; Good mechanical properties, tensile strength of 60MPa, impact strength of 5 ~ 10kJ/m2; Excellent dielectric properties.
Polyvinyl chloride is a polymer material that USES a chlorine atom instead of a hydrogen atom in polyethylene. It is an amorphous polymer containing a small amount of crystalline structure. The structure of this material is as follows: [- CH2 - CHCl -]n. PVC is a linear polymer with the head - tail structure in most of the VCM monomers. Carbon atoms are serrated, and all atoms are connected by a bond. All carbon atoms are sp3 hybridized.
The structure of ABS resin has grafted copolymer with elastomeric chain and graft copolymer with hard ABS resin. Or a mixture of rubber elastomer and hard ABS resin. Thus different structure according to different performance, show the rubber elastomer toughness, hard ABS resin shows rigid, high impact type, can be obtained in the impact, the general and special shock impact and so on several varieties. Specifically, as the content of rubber composition B (generally 5%~30%) increases, the elasticity and impact resistance of the resin will increase. But the tensile strength, fluidity, weatherability and so on decreased. AS the content of resin component AS (generally 70%~95%) increases, it can improve surface gloss, mechanical strength, weatherability, heat resistance, corrosion resistance, electrical performance, processing performance, etc. And the impact strength is going to go down. The proportion of A and B in resin composition is 30%~35%/80%~65%.
Plastic ABS resin production is the largest, the most widely used polymer, it will be PB, PAN, properties of the PS organically unify, both tough and hard, just good mechanics performance of phase equilibrium. ABS is A ternary copolymer of acrylonitrile, butadiene and styrene, A for acrylonitrile, B for butadiene, and S for styrene. After actual use, it was found that ABS plastic tubing, no acid corrosion, and sulfuric acid was crushed.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
PVC is one of the most widely used plastic materials, but it has poor impact resistance, thermal stability and poor processing mobility. ABS is a kind of plastic material with excellent performance and versatility, which has good characteristics of high impact strength, good heat resistance, stable dimension and easy to form and processing.
It can not only improve the processing performance of PVC, but also improve the mechanical properties of PVC, so that the impact strength of PVC/ABS alloy is greater than that of ABS and PVC.
But ABS weather is bad, in the process of storage, processing and using structure changes along with the extension of time, the mechanical properties degradation, become hard and brittle materials, the main reason is that ABS molecular butadiene contained in the double bond in the outdoor sunlight, heat, oxygen and the effect of oxidative degradation.
Moreover, in PVC/ABS alloy, the degradation of ABS will accelerate the degradation of PVC, and the interaction between them makes the weatherability of PVC/ABS alloy worse. Therefore, it is of great practical significance to research and develop the excellent mechanical properties and good weatherability of PVC/ABS alloy, which is of great practical significance for the full play of the use value of the alloy and the development of new plastic varieties.
In 90 ℃ heat aging box, PVC/ABS alloy antioxidants can obviously improve the heat performance of PVC/ABC, varieties of different antioxidants on the improvement of PVC/ABC heat resistance level is different, of which 1076 best; Add PVC/ABS alloy antioxidants are higher than that of blank sample, mechanical performance of the initial sample of PVC/ABS alloy antioxidants not only improves the heat oxygen aging performance of PVC/ABC use process, and to improve the machining process of PVC/ABS thermal oxidation performance.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
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.
During the 120 days of natural exposure, the tensile strength and impact strength of the blank samples decreased greatly. In addition, PVC/ABS samples with ultraviolet absorbent were tested, and the tensile strength and impact strength decreased, and the UV resistance improved, and UV - 327 was the best.
PVC for amorphous structure of white powder, branched degree is small, relative density 1.4, glass transition temperature of 77 ~ 90 ℃, 170 ℃ or so starts to break down , the poor stability to heat and light, in more than 100 ℃ or the sun for a long time, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, cause discoloration, physical and mechanical properties also fell rapidly, must be added in the practical application of stabilizers in order to improve the stability of heat and light.
The PVC molecular weight of industrial production is generally within the range of 50,000 ~ 110,000, with a large amount of dispersibility, and the molecular weight increases with the decrease of polymerization temperature. No fixed melting point, 80 ~ 85 ℃ began to soften, 130 ℃ is a viscoelastic state, 160 ~ 180 ℃ began to change for the viscous flow; Good mechanical properties, tensile strength of 60MPa, impact strength of 5 ~ 10kJ/m2; Excellent dielectric properties.
Polyvinyl chloride is a polymer material that USES a chlorine atom instead of a hydrogen atom in polyethylene. It is an amorphous polymer containing a small amount of crystalline structure. The structure of this material is as follows: [- CH2 - CHCl -]n. PVC is a linear polymer with the head - tail structure in most of the VCM monomers. Carbon atoms are serrated, and all atoms are connected by a bond. All carbon atoms are sp3 hybridized.
The structure of ABS resin has grafted copolymer with elastomeric chain and graft copolymer with hard ABS resin. Or a mixture of rubber elastomer and hard ABS resin. Thus different structure according to different performance, show the rubber elastomer toughness, hard ABS resin shows rigid, high impact type, can be obtained in the impact, the general and special shock impact and so on several varieties. Specifically, as the content of rubber composition B (generally 5%~30%) increases, the elasticity and impact resistance of the resin will increase. But the tensile strength, fluidity, weatherability and so on decreased. AS the content of resin component AS (generally 70%~95%) increases, it can improve surface gloss, mechanical strength, weatherability, heat resistance, corrosion resistance, electrical performance, processing performance, etc. And the impact strength is going to go down. The proportion of A and B in resin composition is 30%~35%/80%~65%.
Plastic ABS resin production is the largest, the most widely used polymer, it will be PB, PAN, properties of the PS organically unify, both tough and hard, just good mechanics performance of phase equilibrium. ABS is A ternary copolymer of acrylonitrile, butadiene and styrene, A for acrylonitrile, B for butadiene, and S for styrene. After actual use, it was found that ABS plastic tubing, no acid corrosion, and sulfuric acid was crushed.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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