Abstract This study presents the evaluation of thermal and thermo-oxidative stability of some polyimide-polydimethylsiloxane (PI-PDMS) copolymers and establishes the thermal degradation mechanism by simultaneous mass spectrometry and Fourier transform infrared spectroscopy of gas products from thermogravimetric analyzer (TG/MS/FTIR) in two working atmospheres: air and He. The thermal stability and the start mechanism of thermal degradation were correlated with the chemical structure of PI-PDMS and the working atmosphere. The main thermal decomposition products were determined in both oxidative and inert atmosphere.

中文翻译：

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一些聚酰亚胺-聚二甲基硅氧烷共聚物的热分解研究

摘要 本研究评估了一些聚酰亚胺-聚二甲基硅氧烷 (PI-PDMS) 共聚物的热稳定性和热氧化稳定性，并通过热重分析仪 (TG/MS/ FTIR) 在两种工作环境中：空气和 He。热稳定性和热降解的启动机制与 PI-PDMS 的化学结构和工作气氛相关。主要的热分解产物在氧化和惰性气氛中测定。