γ-射线辐照PAN原丝结构转变及其热稳定化反应动力学研究  

Study on the structure of PAN precursor irradiated by γ-ray and kinetics of thermal stabilization

作　　者：高益军[1] 刘欣瀛 丛玺璇 刘小云[1] 苏世州 徐樑华[3] 曹维宇[1,3] 

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029 [2]华盛顿圣路易斯大学化学工程系,美国圣路易斯63130 [3]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《化工新型材料》2016年第11期88-90,共3页New Chemical Materials

基　　金：国家科技支撑计划(2014BAE07B00)

摘　　要：使用紫外、红外和核磁共振碳谱等方法对γ射线辐照后的PAN原丝化学结构变化进行了分析,并采用Kissinger动力学分析的方法对比了由于辐照造成的热稳定化反应进程的差异。结果表明:γ射线辐照后PAN原丝同时产生了环状共轭和线性共轭结构,其中线性共轭结构的生成使得热稳定化反应表观活化能增加,而指前因子提高,即辐照后的PAN原丝需要相对较高的热稳定化起始温度,而反应速率得以提高。The structure of PAN precursor irradiated by y-ray was characterized by UV, FT-IR,13C-NMR, etc. The kinetics of thermal stabilization for irradiated and unirradiated PAN precursor was compared by Kissinger＇s method. The results showed that conjugated ring structure and linear conjugate structure were both generated by y-ray irradiation. The linear conjugate structure caused the increase of both apparent activation energy and pre exponential factor, which meant the irradiated PAN precursor required a higher initiating temperature and the reaction rate were improved.

关 键 词：PAN原丝 Γ射线辐照 热稳定化 动力学 

分 类 号：TQ342.742[化学工程—化纤工业]