PAN基碳纤维碳化过程反应动力学研究  

Kinetics analysis of the PAN based carbon fiber during carbonization

作　　者：王梦梵[1] 李龙[1] 陈旺[1] 徐樑华[1] 曹维宇[1] 

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,碳纤维及功能高分子教育部重点实验室,100029

出　　处：《化工新型材料》2013年第5期79-81,共3页New Chemical Materials

基　　金：973计划项目(2011CB605603)

摘　　要：使用热失重分析(TGA)模拟了聚丙烯腈(PAN)预氧纤维在N2气氛中的碳化反应,并使用Kissinger和Ozawa法计算了碳化反应动力学相关参数。在室温～1400℃范围内,碳化反应可以分为三个阶段顺序进行,而且均符合一级反应级数模型。3步反应的活化能值Ea3>Ea2>Ea1,幂前指数A1>A3>A2,反应速率R1>R2>R3。分析表明:环化结构重排的化学反应是碳化步骤的控制反应。The carbonization process of the PAN stabilized fiber in N2 were simulated using thermogravimetry anal- ysis（TGA）. The kinetics parameters for the carbonization were calculated by the Kissinger and Ozawa method. It was found that when up to 1400℃, the carbonization can be divided into three stages, which were all coincide with the one order reaction module. The order of the activation energy for these three reaction were Ea3 〉Ea2〉Eal, for pre-exponential factor were A1〉A3 〉A2, for the reaction rate were R1 〉 R2 〉R3. The key reaction during the carbonization was the rearrangement of the cyclized structure.

关 键 词：PAN基碳纤维 碳化反应 动力学 活化能 

分 类 号：TQ342.742[化学工程—化纤工业]