差示扫描量热仪(DSC)是研究环氧树脂固化动力学的有效手段,获得动力学参数的方法分为模型拟合法和非模型拟合法2类.模型拟合法的关键在于确定动力学三因子,即反应模型、指前因子和活化能;其拟合过程需要事先选择模型及模型参数,并且等温和非等温条件下拟合得到的动力学参数差别较大,无法通过非等温条件下的数据预测等温固化行为.非模型拟合法则通过计算活化能与固化度的对应关系研究固化行为,可以避免模型及模型参数选择不当造成的误差,并且等温和非等温条件下拟合得到的动力学参数基本一致,可由非等温数据预测等温固化行为.准确的动力学方程可为优化固化工艺、提高固化产物性能提供理论基础.
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