摘要
采用非等温差示扫描量热法(DSC)研究了603热塑增韧环氧树脂体系的固化反应动力学。研究发现,在低升温速率测试条件下603环氧树脂体系固化反应的DSC曲线有两个重叠的放热峰,通过分离两个重叠的放热峰,研究了603环氧树脂体系固化动力学的特性。利用Kissinger方法和Kamal方程分别拟合得到603树脂体系固化反应的活化能和固化动力学参数,选择三种典型固化工艺制度下预测的树脂固化反应结果与实验数据对比,验证了所建立动力学模型的可靠性。基于不同升温速率的放热曲线,通过外推法得出该树脂占总反应比例70%的第一个反应固化温度为(177.3±2.2)℃,占总反应比例30%的第二个反应的起始温度和固化温度分别为(178.6±0.7)℃和(216.9±1.7)℃。研究结果对于多组分热固性树脂体系固化动力学的分析和复合材料成型工艺的优化具有重要的指导意义。
The curing kinetics of 603 thermoplastic toughened epoxy resin was investigated by non-isothermal differential scanning calorimetry（DSC）.The curing reaction of 603 epoxy resin system was consisted of two dominant reactions（reaction 1 and 2）,as evidenced by the presence of a double peak on the DSC thermograms.The curing kinetics of the 603 resin system was investigated after separating the two overlapping exothermic peaks.The overall apparent activation energies of the curing processes were fitted respectively with Kissinger method and a two-parameter（m,n）Kamal model was employed to describe the curing kinetics.The reliability of established model was proved by comparing the calculation results with the experimental results of three different curing processes of the epoxy resin system.Based on the exothermic curves at different heating rates,the curing temperature of the reaction1 whose heat accounted for 70% of the total heat of reaction is（177.3±2.2）℃ and the initial temperature and the curing temperature of the reaction 2 whose heat accounted for 30% of the total heat of reaction are（178.6±0.7）℃and（216.9±1.7）℃ respectively by extrapolation method.The results have important significance for the analysis of curing kinetics of multi-component thermosetting resin system and optimization of composite processing.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2018年第1期95-102,共8页
Acta Materiae Compositae Sinica
关键词
热塑增韧环氧树脂
非等温DSC
分峰拟合
固化动力学模型
外推法
thermoplastic toughened epoxy resin
non-isothermal DSC
peak differentiation imitating
cure kinetics model
extrapolation method
