环氧树脂/玻璃纤维模压预浸料固化反应动力学研究  

Curing reaction kinetics of epoxy/glass fiber prepregs for compression molding

作　　者：彭新龙 曾宇清 梁卓恩 谢忆 PENG Xinlong;ZENG Yuqing;LIANG Zhuoen;XIE Yi(Guangdong Brand Builder New Materials Co,Ltd,Zhaoqing 526238,China;Zhaoqing Futian Chemical Co,Ltd,Zhaoqing 526238,China)

机构地区：[1]广东百汇达新材料有限公司,广东肇庆526238 [2]肇庆福田化学工业有限公司,广东肇庆526238

出　　处：《中国塑料》2021年第12期81-87,共7页China Plastics

摘　　要：采用非等温DSC方法研究了一种模压预浸料(环氧树脂/玻璃纤维)的固化动力学,应用Kissinger和Crane方程拟合求得固化动力学参数,并建立了该预浸料固化动力学唯象模型。通过无转子硫化仪测试预浸料在不同温度下的凝胶时间,通过线性拟合得到固化温度与凝胶时间的函数关系,并对预浸料的固化工艺进行优化。结果表明,通过Kissinger和Crane方法算得该预浸料的固化反应动力学表观活化能为89.9 kJ/mol,指前因子为1.17×10^(11) min^(-1),反应级数为0.93;预浸料在模具温度为150℃下预热40 s,环氧树脂具有一定的流动性,并在2 MPa压力下固化300 s,可制备综合性能良好的复合材料制品。The curing reaction process of epoxy/glass fiber prepregs for compression molding was studied using a dynamic DSC method.The curing kinetic parameters of the prepregs were obtained using the Kissinger′s and Crane′s methods,and the phenomenological curing kinetic model was established.The gelation time of the prepregs were obtained using a free rotor vulcanizer at different temperatures.The functional relationship between the curing temperature and gelation time was calculated through a linear fitting method,and the curing process of the prepregs was optimized.The results indicated that the apparent activation energy,pre-exponential factor,and the reaction order of the prepregs were calculated to be 89.9 kJ/mol,1.17×10^(11) and 0.93,respectively,through the Kissinger and Crane methods.The epoxy resin exhibited a certain mobility when the molding temperature and preheating time were set as 150℃ and 40 s,respective.The composites presented optimal comprehensive properties after holding 300 s at a molding pressure of 2 MPa.

关 键 词：环氧树脂 玻璃纤维 预浸料 固化动力学 模压工艺 复合材料 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]