摘要
为了探究不同形态T800级多层碳纤维/环氧树脂复合材料的热解特性及热稳定性,利用热重-差热同步分析仪在氮气气氛下分别对块状及粉末状样品进行不同升温速率的程序控温处理,得到了升温速率对两种形态样品质量损失的影响规律,并进行热解动力学分析。结果表明:块状和粉末状样品的热解均只有一个阶段,即环氧树脂在无氧条件下的热解。两种形态样品的初始分解温度、终止分解温度、最大失重速率温度均随着升温速率的提高而升高,热解温度范围变宽,失重速率峰值变大。利用Kissinger分析法和Flynn-wall-Qzawa分析法进行动力学计算,结果基本相同。两种形态样品的表观活化能均随着反应的进行而逐渐增大,反应难度增加;块状样品相比于粉末状样品在热解初期略为稳定,但整体过程两者稳定性基本一致。
In order to explore the pyrolysis characteristics and thermal stability of different forms of T800 multi-layer carbon fiber/epoxy resin composites,a thermogravimetric-differential thermal synchronous analyzer was used to perform thermal treatment at different heating rates on the bulk and powder samples in a nitrogen atmosphere.The influence of heating rate on mass loss of the two types of samples was obtained by programed temperature control process,and the pyrolysis kinetic analysis was carried out.The results show that there is only one stage of pyrolysis of the bulk and powder samples,that is,the pyrolysis of epoxy resin under anaerobic conditions.The initial decomposition temperature,termination decomposition temperature and maximum weight loss rate temperature of the two forms of samples increased with the increase of the heating rate,the pyrolysis temperature range became wider,and the peak weight loss rate became larger.The results are basically the same by using Kissinger analysis method and Flynn-wall-Qzawa analysis method for kinetic calculations.The apparent activation energy of the two forms of samples gradually increase with the progress of the reaction,and the difficulty of the reaction increases.The powdered sample is slightly stable in the initial stage of pyrolysis compared with the bulk sample,but the stability of the two is basically the same during the whole process.
作者
毛俊杰
王志
文放
谢飞
MAO Jun-jie;WANG Zhi;WEN Fang;XIE Fei(College of Safety Engineering,Shenyang Aerospace University,Shenyang 110136,China;China Aero-Polytechnology Establishment,Beijing 100028,China;The Second Research Institute of CAAC,Chengdu 610041,China)
出处
《沈阳航空航天大学学报》
2022年第2期21-27,共7页
Journal of Shenyang Aerospace University
基金
国家自然科学基金(项目编号:61901283)
辽宁省自然科学基金(项目编号:201602567)。
关键词
多层碳纤维
环氧树脂
热解特性
热解动力学
表观活化能
multilayer carbon fiber
epoxy
pyrolysis characteristics
pyrolysis kinetics
apparent activation energy
