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Flame retardant of polystyrene
2017-11-8 10:51:50
Flame retardant of polystyrene
Flame retardant mainly include organic phosphate, red phosphorus and ammonium polyphosphate (APP), the flame retardant mechanism of both gas phase mechanism, there are cameras but with condensed condensed science, science as the main camera. A non flammable liquid film is formed when phosphoric acid is decomposed during combustion, while phosphoric acid is further dehydrated to form partial phosphoric acid and further polymerized to form poly phosphoric acid. Poly (phosphoric acid) has strong dehydration, which makes the polymer dehydrate and carbonization, change the combustion mode of polymer, and form carbon layer on its surface to isolate the air and play the role of flame retardant.
Ammonium polyphosphate has high phosphorus content, high nitrogen content, good thermal stability, low moisture absorption, good dispersion, low toxicity and smoke suppression. It can be used as a flame retardant for polystyrene.
The addition of polystyrene flame retardant has a significant influence on the combustion properties of polystyrene. With the increase of the amount of polystyrene flame retardant, the oxygen index of polystyrene increases gradually.
When the content of ammonium polyphosphate is 25%, the oxygen index of polystyrene reaches 33%, and the vertical combustion can pass UL-94V-0 grade. It belongs to nonflammable material and has self extinguishing property. At present, polystyrene flame retardant ammonium polyphosphate is more widely used in intumescent flame retardant system, as an acid source and foaming agent, to improve the flame retardancy of polystyrene.
Yu Baogang et al. Studied the effects of phosphorus based flame retardants 1, 3, 5- three (5, 5- two methyl -1, 3- two oxy phenyl phosphate) benzene (FR) and ammonium polyphosphate on the flame retardancy of polystyrene. The results showed that FR/ ammonium polyphosphate improved the limiting oxygen index, thermal stability and char yield of polystyrene, and reduced the heat release rate. When the content of FR is 15% and the content of ammonium polyphosphate is 10%, the limiting oxygen index of polystyrene is 29.6%, and the flame retardant grade reaches UL-94V-0 grade.
A halogen free flame retardant polystyrene composite was prepared by Wang Huiya et al. Using a novel phosphorus flame retardant 1, 2, 3- three (5, 5- two methyl -1, 3- two). The results show that the flame retardant added 25% in polystyrene can obtain good flame retardant effect, oxygen index reached 25.5%, the average heat release rate decreased by 22.5%, the average effective heat of combustion and burning down 61%, after the formation of the carbonized layer countless holes closed.
Zhou Jian /Mg (OH) 2 with red phosphorus synergistic flame retardant, polystyrene toughening agent for polyolefin elastomer was prepared, halogen-free flame retardant polystyrene composite material by melt extrusion. Research shows that /Mg (OH) 2 red phosphorus flame retardant system has good synergistic effect in polystyrene, has obvious effects on mechanical properties of flame retardant agent on composite materials.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
Yellow Zhaoge using coated red phosphorus (MRP) as halogen-free flame retardant on the flame retardant modified polystyrene. The results showed that the combination of 10 MRP and 80 Mg (OH) 2 had obvious synergistic flame retardant effect, which made the oxygen index of polystyrene reach 29% and the comprehensive properties were good. The heat release rate, effective combustion heat and mass loss rate of polystyrene /Mg (OH) 2/MRP system were determined by cone calorimeter, and the flame retardant effect of the system was further verified.
Hao Jianwei used the amino silane coupling agent on ammonium polyphosphate were surface modified, the modified ammonium polyphosphate has good hydrophobicity, amino silane coupling agent and ammonium polyphosphate were bonded reaction of modified ammonium polyphosphate thermal weight loss rate decreased significantly. The flame retardancy of intumescent flame retardant polystyrene modified with ammonium polyphosphate and pentaerythritol was improved, and the tensile strength and elongation at break were improved obviously.
Intumescent flame retardant (IFR) composed of carbon source, acid source and gas source in the combustion of acid source will release inorganic acid, the carbon source containing polyols esterification, dehydration and carbonization, small molecule carbonized product produced in the thick water vapor and inert gas, polymer degradation reaction of volatile gas release from under the action of expansion, the formation of microporous carbon layer.
The carbon layer has the function of heat insulation, oxygen separation, no droplet and flame self extinguishing. IFR overcomes the adverse effects of halogen containing flame retardant, multi droplet combustion smoke shortcomings and inorganic flame retardant due to the addition of a large amount of material mechanical properties, processing properties caused by so in recent years become one of the most active research fields of flame retardant. The flame retardant polystyrene, often using ammonium polyphosphate, polyurea, pentaerythritol (PER) and melamine (MA) as the system expansion, between them and some contain cyclic nitride component has a strong synergistic effect.
Feng Caimin et al. Compounded flame retardant polystyrene with melamine polyphosphate (M polystyrene) and caged pentaerythritol phosphate (PEPA). The effects of M polystyrene /PEPA mass ratio and Cr2O3 content on the flame retardancy and mechanical properties of polystyrene were studied.
The results show that when the mass ratio of M polystyrene /PEPA is 3:2, the composite effect is the best; adding a small amount of Cr2O3 can significantly improve the flame retardancy of the composite. When the contents of M, PEPA and Cr2O3 were 12%, 8% and 2%, the oxygen index of flame retarded polystyrene was as high as 31.5%, and the mechanical properties of the flame retardant polystyrene were good. Cr2O3 can catalyze the esterification of M polystyrene /PEPA, promote the carbon deposition of materials, slow down the thermal degradation rate of materials, and improve the thermal insulation and oxygen separation ability of materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Flame retardant mainly include organic phosphate, red phosphorus and ammonium polyphosphate (APP), the flame retardant mechanism of both gas phase mechanism, there are cameras but with condensed condensed science, science as the main camera. A non flammable liquid film is formed when phosphoric acid is decomposed during combustion, while phosphoric acid is further dehydrated to form partial phosphoric acid and further polymerized to form poly phosphoric acid. Poly (phosphoric acid) has strong dehydration, which makes the polymer dehydrate and carbonization, change the combustion mode of polymer, and form carbon layer on its surface to isolate the air and play the role of flame retardant.
Ammonium polyphosphate has high phosphorus content, high nitrogen content, good thermal stability, low moisture absorption, good dispersion, low toxicity and smoke suppression. It can be used as a flame retardant for polystyrene.
The addition of polystyrene flame retardant has a significant influence on the combustion properties of polystyrene. With the increase of the amount of polystyrene flame retardant, the oxygen index of polystyrene increases gradually.
When the content of ammonium polyphosphate is 25%, the oxygen index of polystyrene reaches 33%, and the vertical combustion can pass UL-94V-0 grade. It belongs to nonflammable material and has self extinguishing property. At present, polystyrene flame retardant ammonium polyphosphate is more widely used in intumescent flame retardant system, as an acid source and foaming agent, to improve the flame retardancy of polystyrene.
Yu Baogang et al. Studied the effects of phosphorus based flame retardants 1, 3, 5- three (5, 5- two methyl -1, 3- two oxy phenyl phosphate) benzene (FR) and ammonium polyphosphate on the flame retardancy of polystyrene. The results showed that FR/ ammonium polyphosphate improved the limiting oxygen index, thermal stability and char yield of polystyrene, and reduced the heat release rate. When the content of FR is 15% and the content of ammonium polyphosphate is 10%, the limiting oxygen index of polystyrene is 29.6%, and the flame retardant grade reaches UL-94V-0 grade.
A halogen free flame retardant polystyrene composite was prepared by Wang Huiya et al. Using a novel phosphorus flame retardant 1, 2, 3- three (5, 5- two methyl -1, 3- two). The results show that the flame retardant added 25% in polystyrene can obtain good flame retardant effect, oxygen index reached 25.5%, the average heat release rate decreased by 22.5%, the average effective heat of combustion and burning down 61%, after the formation of the carbonized layer countless holes closed.
Zhou Jian /Mg (OH) 2 with red phosphorus synergistic flame retardant, polystyrene toughening agent for polyolefin elastomer was prepared, halogen-free flame retardant polystyrene composite material by melt extrusion. Research shows that /Mg (OH) 2 red phosphorus flame retardant system has good synergistic effect in polystyrene, has obvious effects on mechanical properties of flame retardant agent on composite materials.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
Yellow Zhaoge using coated red phosphorus (MRP) as halogen-free flame retardant on the flame retardant modified polystyrene. The results showed that the combination of 10 MRP and 80 Mg (OH) 2 had obvious synergistic flame retardant effect, which made the oxygen index of polystyrene reach 29% and the comprehensive properties were good. The heat release rate, effective combustion heat and mass loss rate of polystyrene /Mg (OH) 2/MRP system were determined by cone calorimeter, and the flame retardant effect of the system was further verified.
Hao Jianwei used the amino silane coupling agent on ammonium polyphosphate were surface modified, the modified ammonium polyphosphate has good hydrophobicity, amino silane coupling agent and ammonium polyphosphate were bonded reaction of modified ammonium polyphosphate thermal weight loss rate decreased significantly. The flame retardancy of intumescent flame retardant polystyrene modified with ammonium polyphosphate and pentaerythritol was improved, and the tensile strength and elongation at break were improved obviously.
Intumescent flame retardant (IFR) composed of carbon source, acid source and gas source in the combustion of acid source will release inorganic acid, the carbon source containing polyols esterification, dehydration and carbonization, small molecule carbonized product produced in the thick water vapor and inert gas, polymer degradation reaction of volatile gas release from under the action of expansion, the formation of microporous carbon layer.
The carbon layer has the function of heat insulation, oxygen separation, no droplet and flame self extinguishing. IFR overcomes the adverse effects of halogen containing flame retardant, multi droplet combustion smoke shortcomings and inorganic flame retardant due to the addition of a large amount of material mechanical properties, processing properties caused by so in recent years become one of the most active research fields of flame retardant. The flame retardant polystyrene, often using ammonium polyphosphate, polyurea, pentaerythritol (PER) and melamine (MA) as the system expansion, between them and some contain cyclic nitride component has a strong synergistic effect.
Feng Caimin et al. Compounded flame retardant polystyrene with melamine polyphosphate (M polystyrene) and caged pentaerythritol phosphate (PEPA). The effects of M polystyrene /PEPA mass ratio and Cr2O3 content on the flame retardancy and mechanical properties of polystyrene were studied.
The results show that when the mass ratio of M polystyrene /PEPA is 3:2, the composite effect is the best; adding a small amount of Cr2O3 can significantly improve the flame retardancy of the composite. When the contents of M, PEPA and Cr2O3 were 12%, 8% and 2%, the oxygen index of flame retarded polystyrene was as high as 31.5%, and the mechanical properties of the flame retardant polystyrene were good. Cr2O3 can catalyze the esterification of M polystyrene /PEPA, promote the carbon deposition of materials, slow down the thermal degradation rate of materials, and improve the thermal insulation and oxygen separation ability of materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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