以三聚氰氯、γ-氨丙基三乙氧基硅烷及对苯二胺为主要原料合成了一种含有机硅的三嗪类成炭刹（L、A），将其与多聚磷酸铵（APP）复配成膨胀型阻燃剂（IFR）用于聚丙烯（PP）阻燃。研究了APP与CA的配比及用量对PP阻燃性能、力学性能和热稳定性能的影响。结果表明，阻燃改性后的PP具有良好的阻燃性能和力学性能；CA具行优良的成炭作用，含硅基团能够促进PP成炭，提高了PP的热稳定性，有效地抑制了PP的进一步燃烧；当APP／CA为3／1、复配阻燃剂添加量为28％（质量分数，下同）时，阻燃PP的极限氧指数为32．5％，垂直燃烧达UL94 V-0级。%An organic silicon-containing charring agents （CA） was synthesized from cyanuryl chloride, 3-triethoxysilylpropylamine, and p-phenylenediamine, which was introduced into polypropylene （PP） together with ammonium polyphosphate （APP） as an intumescent flame retardant （IFR）. The effects of APP/CA on flame retardancy, mechanical properties, and thermal stability of PP were investigated. It showed that APP/CA had excellent flame retardancy in PP. CA had a good function in char formation. The organic silicon group could accelerate charring performance of PP, and make the structure of char layer continuous and compact. The addition of APP/CA improved the thermal stability of PP, effectively restrained the further burning of PP. When the weight ratio of APP/CA was 3/1, and the loading was 28 % in PP, the limited oxygen index of APP/CA/PP reached 32.5% and passed UL 94 V-0 grade.
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