用差示扫描量热法(DSC)在动态条件下对840S 环氧树脂体系的固化反应动力学进行了研究.根据所测量的不同升温速率的DSC 曲线,运用温度升温速率(T-β)图外推法得到该环氧树脂体系的固化工艺参数,即凝胶化温度、固化温度、后处理温度,这些温度参数为制定合理的固化工艺提供了理论基础.采用Kissinger方程和Crane方程计算该840S 环氧树脂体系的动力学参数,即表观活化能Ea、表观频率因子A和反应级数n.根据所计算的动力学参数,建立了该840S 环氧树脂体系的固化动力学模型.利用所建立的固化动力学模型分别预测了等温和动态条件下840S 环氧树脂体系的固化反应特性.
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