摘要
使用DTG-60(AH)热重-差热同步分析仪研究了升温速率对典型碳纤维编织布(T300-3000)热解特性的影响。结果表明,升温速率对典型碳纤维编织布的热解过程有显著的影响。随着升温速率的提高最大失重速率温度向高温方向移动,两峰之间的距离逐渐增大,峰面积不断增加。碳纤维编织布的热解分可为三个阶段:环氧树脂基两个分解阶段和碳纤维分解阶段。用Kissinger法和Flynn-Wall-Ozawa法进行热解动力学分析,得到了不同升温速率条件下的表观活化能和表观指前因子。用两种计算方法得到的结果基本上一致,加入环氧树脂基材的碳纤维编织布在一定质量损失范围内的热稳定性较强且可控。
The influence of heating rate on the pyrolysis characteristics of a carbon fiber bidirectional sheet （T300-3000） in air stream was investigated by means of DTG-60（AH） TG/DTA simultaneous thermal analyzer. The results show that the thermal degradation behavior of the sheet was affected greatly by heating rate. The temperature related with the maximum mass loss rate shifted towards high tempera- ture, and the distance between the two peaks of DTG curves was gradually larger and the peak areas increased with the increasing heating rate. The pyrolysis process of the carbon fiber bidirectional sheet can be divided into three stages including two decomposition stages of epoxy resin and one of the carbon fiber decomposition. The pyrolysis kinetics curves of the carbon fiber bidirectional sheet were analyzed by Kissinger method and Flynn-Wall-Ozawa method, and the acquired apparent activation energy and the apparent pre-exponential factor for different heating rates were of good accordance with each other. The thermostability of the carbon fiber bidirectional sheet with epoxy resin is relatively strong and controllable within a certain range of mass loss.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2017年第1期57-64,共8页
Chinese Journal of Materials Research
基金
辽宁省科学事业公益研究基金(GY2014-C-005)
辽宁省自然科学基金(201602567)~~
关键词
复合材料
碳纤维编织布
热解动力学
表观活化能
热稳定性
composites, carbon fiber bidirectional sheet, pyrolysis kinetics, apparent activation energy, thermal stability
