聚碳硅烷纤维的空气不熔化反应动力学研究  

Research on the Air Curing Kinetics of Polycarbosilane Fiber

作　　者：程祥珍[1] 谢征芳[1] 宋永才[1] 肖加余[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2006年第6期24-27,共4页Journal of National University of Defense Technology

基　　金：湖南省自然科学基金资助项目(03JJY3070);国防科技重点实验室基金资助项目

摘　　要：以高压法聚碳硅烷(Polycarbosilane,PCS)纤维的空气不熔化为例,采用多曲线积分法研究了PCS纤维空气不熔化反应动力学。结果表明,高压法PCS纤维的空气不熔化反应活化能约60~70 kJ/mol。通过研究不同的机理函数的对数与温度倒数的关系,结果表明,PCS纤维空气不熔化过程由随机成核和生长机理(n=3)的表面反应控制,根据该反应机理,同样得到高压法PCS的空气不熔化反应活化能约60~70 kJ/mol,指前因子A约为77.64。The air curing kinetics of PCS fiber was investigated by multi-curve integral method of thermogravimetric analysis.The PCS fiber was obtained by melt spinning of PCS which was synthesized at high temperature under high pressure.The results show that the apparent active energy of curing reaction of the PCS fiber is about 60～70 kJ/mol.The relationships between the mechanism functions and the curing temperature were studied.The results show that the air curing reaction of PCS fiber is controlled by the surface...

关 键 词：聚碳硅烷纤维 空气不熔化 热分析 动力学 

分 类 号：TQ343.6[化学工程—化纤工业]