采用TGA/DSC同步热分析仪用非等温法对水性封闭型聚异氰酸酯/含羟基聚丙烯酸酯体系的热固化动力学进行了研究.选取4组不同的升温速率(5,10,15,20℃/min),得到TG和DSC曲线.在20℃/min升温速率下出现异常TG曲线后,研究了该升温速率对固化动力学研究的影响.结果表明,出现上述异常情况,对固化动力学结果影响较大,应不考虑该升温速率下的DSC数据.同时得到该水性封闭型脂肪族聚异氰酸酯/含羟基聚丙烯酸酯体系的固化反应表观活化能为47.88 kJ·mol-1,表观频率因子为5.82×107 s-1,反应级数为0.90.
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