聚苯氧基磷腈的合成表征及热裂解机理研究

摘要

利用六氯环三磷腈热开环聚合得到聚二氯磷腈,通过亲核取代制备了聚苯氧基磷腈(PPP),采用NMR(31P,1H,13C),FT-IR,TGA等对其结构和性能进行了表征和分析,裂解色谱-气相色谱-质谱对聚苯氧基磷腈的热裂解机理进行了探讨研究.结果表明,聚苯氧基磷腈具有很好的耐热性能,在高温阶段存在不同的热分解模式,在400℃时主要为侧基的断裂,500℃以上主要为主链的断裂.%Polyphenoxyphosphazene(PPP) was prepared from nucleophilic substitute reaction poly-(dichlorophosphazene),which was synthesized by thermal ring- open polymerization through hexachlorocyclotriphosphazene.The structure and property of PPP were analyzed by FT-IR, NMR, TGA.Pyrolysis mechanism of PPP was discussed by pyrolysis gas chromatography-gas chromatography-mass spectrometry.The results show that PPP has good heat resistance and has different thermal decomposition mode in high temperature, the side groups fracture at 400 ℃, main chain fracture above 500 ℃.