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首页> 外文期刊>Polymers for advanced technologies >Relationship between structures of phosphorus compounds and flame retardancies of the mixtures with acrylonitrile-butadiene-styrene and ethylene-vinyl acetate copolymer
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Relationship between structures of phosphorus compounds and flame retardancies of the mixtures with acrylonitrile-butadiene-styrene and ethylene-vinyl acetate copolymer

机译：含磷化合物的结构与丙烯腈-丁二烯-苯乙烯和乙烯-乙酸乙烯酯共聚物的混合物的阻燃性之间的关系

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摘要

Various analogos of phosphonic acid, phosphinic acid, and CH_3-P(O) group containing organo-phosphorus compounds were synthesized as model compounds to investigate the effects of P content and the structure of flame retardant (FR) on their fire retarding performances of acrylonitrile-butadiene-styrene (ABS) and ethylene-vinyl acetate (EVA) copolymer. The success of synthesis was confirmed by 1H- and 31P-NMR. The flame retarding efficiencies were evaluated by a UL-94 vertical test method. Thermogravimetric analysis results reveal that all the mixtures of FRs with ABS or EVA exhibit no or very little charred residues at 600℃ under inert atmosphere condition, indicating that all FRs work in the gas phase rather than in the condensed phase for both ABS and EVA. The fire retarding efficiency of FR depends not only on the P content in FR but also on the nature of its structure. UL-94 results show that P FRs with -CH_3 group attached to the P atom exhibits the best fire retarding performance on both ABS and EVA. It was found that at least 4 wt% P in the formulation is required to show self-extinguishing ability for both ABS and EVA when P FRs having -CH_3 group are employed. The fire retarding efficiency of P FRs with different attached group is in order of: -CH_3 > -C_6H_5 > -OH > -H.
机译：合成了膦酸，次膦酸和含CH_3-P（O）基团的有机磷化合物的各种类似物作为模型化合物，研究了磷含量和阻燃剂（FR）的结构对丙烯腈阻燃性能的影响。 -丁二烯-苯乙烯（ABS）和乙烯-乙酸乙烯酯（EVA）共聚物。 1 H-和31 P-NMR证实了合成的成功。通过UL-94垂直测试方法评估阻燃效率。热重分析结果表明，在惰性气氛下，600℃时，FR与ABS或EVA的所有混合物均没有或仅有很少的焦化残渣，这表明ABS和EVA的所有FR均在气相而不是在冷凝相中工作。 FR的阻燃效率不仅取决于FR中的P含量，还取决于其结构的性质。 UL-94结果表明，带有-CH_3基团的P FR在ABS和EVA上均表现出最佳的阻燃性能。已经发现，当使用具有-CH_3基团的P FR时，制剂中至少需要4wt％的P才能表现出对ABS和EVA的自熄能力。具有不同连接基团的P FR的阻燃效率按以下顺序排列：-CH_3> -C_6H_5> -OH> -H。

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