A novel benzoxazine, containing silicon (Si) in the main chain and bonded to two benzene ring, was synthesized from aniline, bis(p-hydroxyphenyl)dimethylsilane, and paraformaldehyde. The structure was characterized by proton nuclear magnetic resonance and Fourier transform infrared (FTIR) spectra. The curing behavior of the benzoxazine was evaluated by differential scanning calorimeter and in situ FTIR. The thermal stability of the resulting polybenzoxazine was studied by thermogravimetric analysis under nitrogen and air atmospheres. The results indicated that the Si-containing polybenzoxazine possessed significantly higher initial degradation temperature and char yield than conventional bisphenol A/aniline-based polybenzoxazine.

中文翻译：

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含硅苯并恶嗪的合成及热性能

以苯胺、双（对羟基苯基）二甲基硅烷和多聚甲醛为原料，合成了一种主链含有硅（Si）并与两个苯环键合的新型苯并恶嗪。该结构通过质子核磁共振和傅里叶变换红外 (FTIR) 光谱表征。苯并恶嗪的固化行为通过差示扫描量热仪和原位 FTIR 进行评估。在氮气和空气气氛下通过热重分析研究所得聚苯并恶嗪的热稳定性。结果表明，含硅聚苯并恶嗪比传统的双酚 A/苯胺基聚苯并恶嗪具有显着更高的初始降解温度和焦炭产率。