To obtain a polyacrylonitrile (PAN) material with highly thermal stability and flame retardance properties, a novel P(AN‐co‐DMVP) copolymers were successfully synthesized by randomly copolymerization. According to thermogravimetry analysis, it revealed that incorporating dimethyl vinylphosphonate (DMVP) into the PAN chains can perform outstanding thermal stability. Furthermore, the limiting oxygen index increased from 18.6% to 30.0% with addition of 22.6 wt% DMVP. The results of cone calorimetry tests certified that the peak‐heat release peak and total heat release of P(AN‐co‐DMVP22.6) were remarkably dropped by 70% and 33%, respectively, suggesting excellent flame retardance. The relationship between copolymer structures and flame‐retardant performance was systematically investigated by X‐ray photoelectron spectroscopy, Raman spectroscopy, thermogravimetric analysis‐Fourier transform infrared and Pyrolysis gas chromatography/mass spectrometry. A comprehensive flame‐retardant mechanism has been proposed that DMVP plays a role in both the gaseous phase and the condensed phase.

中文翻译：

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乙烯基膦酸二甲酯增强聚丙烯腈的阻燃性

为了获得具有高热稳定性和阻燃性的聚丙烯腈（PAN）材料，通过无规共聚成功地合成了新型P（AN- co- DMVP）共聚物。根据热重分析，发现将乙烯基膦酸二甲酯（DMVP）掺入PAN链中可以表现出出色的热稳定性。此外，通过添加22.6重量％的DMVP，极限氧指数从18.6％增加到30.0％。锥形量热测试的结果证明了P（AN- co‐DMVP22.6）分别显着下降了70％和33％，表明具有出色的阻燃性。通过X射线光电子能谱，拉曼光谱，热重分析-傅里叶变换红外光谱和热解气相色谱/质谱系统地研究了共聚物结构与阻燃性能之间的关系。已经提出了一种全面的阻燃机制，DMVP在气相和冷凝相中均起着作用。