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The development trend of polypropylene flame retardant
2017-9-16 23:46:46
The development trend of polypropylene flame retardant
Along with the environmental protection increasing, phosphorus-containing flame retardant because of the large amount of smoke, releasing toxic and corrosive gases will gradually fade out of pp flame retardant field, emphatically used halogen-free flame retardants such as inorganic flame retardants and intumescent flame retardants will be development trend of polypropylene with flame retardants.
Inorganic flame retardants have the advantages of non-toxic, non-corrosive, non-corrosive and high temperature resistance. But the addition of inorganic flame retardants has great influence on the processing performance and mechanical properties of polypropylene. Surface modification and micro-refinement can be used to solve the above defects. Nano-inorganic flame retardant will be the development trend of the inorganic polypropylene flame retardant.
Expansion type flame retardant because of less smoke when burning, gas harmless and generated the carbon layer can effectively prevent the advantages of polymer melt drip, very suitable for flame retardant polypropylene has been research hot spots. Therefore, the continuous improvement and improvement of the new type expansion flame retardant is one of the development trend of polypropylene flame retardant.
Made up of traditional flame retardant synergistic flame retardant system integrated their excellent performance, good flame retardant effect, low cost, as well as flame retardant and smoke suppression, also have some other special function, was very broad prospects. It can be used to reduce the amount of flame retardant and improve the flame retardant performance of polypropylene by remixing with other flame retardants.
Nano-clay and carbon nanotubes will be the focus of future research on polypropylene flame retardants, and the recombination of other traditional flame retardants will be the mainstream flame retardants in the future.
There is any kind of flame retardant of the flaws of some future with flame retardant polypropylene not only needed to significantly improve the flame retardant performance, but also can improve the mechanical properties, thermal properties and other physical properties. In addition, the flame retardants must meet the characteristics of non-toxic odorless, pollution-free, simple manufacturing and abundant raw materials. The future development of the compound flame retardant will be highly effective flame retardant, low smoke, non-toxic, green environmental protection, low filling quantity, low cost, multi-function, fine type and other characteristics.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Therefore, in the future should be thoroughly studies the technology of surface modification of inorganic flame retardants, solve the problem of dispersion, the stick to reduce the influence of its degradation material mechanical properties, and further development of novel intumescent flame retardant agent and flame retardant association agent.
Using polypropylene - g - MAH as compatibilizer, the polypropylene is inserted into the layered silicate layers structure, the formation of the thermal stability of the nanocomposites increased significantly, thermal degradation reaction is hampered by greatly, will in the density of surface formation in the process of burning charcoal layer, the flame retardant properties of the composite increase. Burning flame retardant mechanism is thought to be formed when the hard coke of insulation, insulation, low permeability layer to prevent the oxygen supply, thermal degradation of volatile matter of escape, the spread of the combustion heat make pp flame retardant performance was improved.
IFR has synergistic effect with clay, clay can react with ammonium polyphosphate form aluminum phosphate ceramic structure and class, increase the carbon layer of protection, make polypropylene has more excellent flame retardant performance. Using PA6 as a carbon agent, IFR has the shortcoming of molten drop and flame retardant effect, and the addition of 4% nano montmorillonite not only overcomes the shortcomings of the melt, but also increases the tensile strength by 44.3%. In addition, the thermal stability of polypropylene was improved, and the residual carbon rate increased by 12%. Nano-montmorillonite can enhance the adhesion of the interface and enhance the toughness of the material.
The flame retardant modification of polypropylene was carried out by qu handsome et al in IFR as the flame retardant, montmorillonite as coagent and polypropylene - g-mah as the addition agent. The results showed that the addition of montmorillonite reduced the flame-retardant performance and mechanical properties of the polypropylene/IFR system, but solved the smoke of the system to some extent. When the IFR dosage is 35, the vertical combustion performance of the system reaches the fv-0 level, and the combustion residue forms the dense carbon layer, and has good mechanical properties and processing performance.
Conventional pp flame retardants is hard to get ideal heat release rate, after adding a small amount of carbon nanotubes in polypropylene, the flame retardant performance get a raise, even higher than the flame retardant properties of polypropylene/organic clay nanocomposites. Carbon nanotubes have lipophilicity, scattered in the polypropylene is much easier than clay, don't need to deal with and the use of solvents, organic modification will not bring because of poor thermal stability of organic modifier on the negative impact of pp flame retardant properties and mechanical properties.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Along with the environmental protection increasing, phosphorus-containing flame retardant because of the large amount of smoke, releasing toxic and corrosive gases will gradually fade out of pp flame retardant field, emphatically used halogen-free flame retardants such as inorganic flame retardants and intumescent flame retardants will be development trend of polypropylene with flame retardants.
Inorganic flame retardants have the advantages of non-toxic, non-corrosive, non-corrosive and high temperature resistance. But the addition of inorganic flame retardants has great influence on the processing performance and mechanical properties of polypropylene. Surface modification and micro-refinement can be used to solve the above defects. Nano-inorganic flame retardant will be the development trend of the inorganic polypropylene flame retardant.
Expansion type flame retardant because of less smoke when burning, gas harmless and generated the carbon layer can effectively prevent the advantages of polymer melt drip, very suitable for flame retardant polypropylene has been research hot spots. Therefore, the continuous improvement and improvement of the new type expansion flame retardant is one of the development trend of polypropylene flame retardant.
Made up of traditional flame retardant synergistic flame retardant system integrated their excellent performance, good flame retardant effect, low cost, as well as flame retardant and smoke suppression, also have some other special function, was very broad prospects. It can be used to reduce the amount of flame retardant and improve the flame retardant performance of polypropylene by remixing with other flame retardants.
Nano-clay and carbon nanotubes will be the focus of future research on polypropylene flame retardants, and the recombination of other traditional flame retardants will be the mainstream flame retardants in the future.
There is any kind of flame retardant of the flaws of some future with flame retardant polypropylene not only needed to significantly improve the flame retardant performance, but also can improve the mechanical properties, thermal properties and other physical properties. In addition, the flame retardants must meet the characteristics of non-toxic odorless, pollution-free, simple manufacturing and abundant raw materials. The future development of the compound flame retardant will be highly effective flame retardant, low smoke, non-toxic, green environmental protection, low filling quantity, low cost, multi-function, fine type and other characteristics.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Therefore, in the future should be thoroughly studies the technology of surface modification of inorganic flame retardants, solve the problem of dispersion, the stick to reduce the influence of its degradation material mechanical properties, and further development of novel intumescent flame retardant agent and flame retardant association agent.
Using polypropylene - g - MAH as compatibilizer, the polypropylene is inserted into the layered silicate layers structure, the formation of the thermal stability of the nanocomposites increased significantly, thermal degradation reaction is hampered by greatly, will in the density of surface formation in the process of burning charcoal layer, the flame retardant properties of the composite increase. Burning flame retardant mechanism is thought to be formed when the hard coke of insulation, insulation, low permeability layer to prevent the oxygen supply, thermal degradation of volatile matter of escape, the spread of the combustion heat make pp flame retardant performance was improved.
IFR has synergistic effect with clay, clay can react with ammonium polyphosphate form aluminum phosphate ceramic structure and class, increase the carbon layer of protection, make polypropylene has more excellent flame retardant performance. Using PA6 as a carbon agent, IFR has the shortcoming of molten drop and flame retardant effect, and the addition of 4% nano montmorillonite not only overcomes the shortcomings of the melt, but also increases the tensile strength by 44.3%. In addition, the thermal stability of polypropylene was improved, and the residual carbon rate increased by 12%. Nano-montmorillonite can enhance the adhesion of the interface and enhance the toughness of the material.
The flame retardant modification of polypropylene was carried out by qu handsome et al in IFR as the flame retardant, montmorillonite as coagent and polypropylene - g-mah as the addition agent. The results showed that the addition of montmorillonite reduced the flame-retardant performance and mechanical properties of the polypropylene/IFR system, but solved the smoke of the system to some extent. When the IFR dosage is 35, the vertical combustion performance of the system reaches the fv-0 level, and the combustion residue forms the dense carbon layer, and has good mechanical properties and processing performance.
Conventional pp flame retardants is hard to get ideal heat release rate, after adding a small amount of carbon nanotubes in polypropylene, the flame retardant performance get a raise, even higher than the flame retardant properties of polypropylene/organic clay nanocomposites. Carbon nanotubes have lipophilicity, scattered in the polypropylene is much easier than clay, don't need to deal with and the use of solvents, organic modification will not bring because of poor thermal stability of organic modifier on the negative impact of pp flame retardant properties and mechanical properties.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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