聚硅氮烷固化硅橡胶产物的热降解动力学研究  

Study on thermal degradation kinetics of silicone rubber product cured by polysilazane

作　　者：吕浩浩 李杰[1] 郭安儒[1] 赵珩 Lyu Haohao;Li Jie;Guo Anru;Zhao Heng(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《中国胶粘剂》2022年第4期28-31,36,共5页China Adhesives

摘　　要：以聚硅氮烷(PSN)为固化剂,加至羟基封端聚甲基硅氧烷基体中,制备了室温硫化硅橡胶。通过热失重分析技术(TG)探究了硅橡胶的热降解动力学机理。研究结果表明:PSN固化硅橡胶产物的降解反应符合相界面反应(圆柱形对称)模型,并确定了热降解反应动力学方程。Room temperature vulcanized silicone rubber was prepared by using polysilazane(PSN)as curing agent and adding it into hydroxyl-terminated polymethylsiloxane matrix.The kinetic mechanism of thermal degradation of silicone rubber was investigated by thermogravimetric analysis(TG).The research results showed that the degradation reaction of PSN cured silicone rubber product conformed to the phase interface reaction(cylindrical symmetry)model,and the kinetic equation of thermal degradation reaction was determined.

关 键 词：聚硅氮烷 固化剂 室温硫化硅橡胶 热降解机理 

分 类 号：TQ430.4[化学工程]