采用DSC法和黏度法研究聚硫密封剂室温硫化过程中的反应动力学.在20～40℃,通过非等温和等温DSC实验测量密封剂硫化反应热,得到硫化反应程度和反应速率,经非线性拟合获得了活化能参数、具温度依赖的反应速率常数和反应级数,建立了改进的Kamal动力学模型方程,方程曲线与实验点相吻合,表明密封剂在硫化反应初期(硫化程度α＜0.4)具有自催化反应特征,而在后期(α＞0.4)受扩散控制.测定了硫化过程中的黏度变化,其与硫化温度和硫化反应程度有关,拟合得到的黏温方程曲线在20～30℃,α＜0.4时与实验数据相吻合.
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