塑料 酚醛树脂 用差示扫描量热法测定反应热及温度

[中文适用范围]： 该方法的原理是测量提供给测试样品的热通量随时间或温度的变化，同时测试样品在指定的气氛下接受一定的温度安排。 反应的标志是样品释放能量，导致加热曲线中出现放热峰。 将记录的峰面积作为时间函数的积分给出了反应能量的测量。 适用于具有放热行为的酚醛树脂，例如甲阶酚醛树脂或酚醛清漆与六亚甲基四胺或其他固化剂的混合物。 [外文原描述]： The principle of the method specified is measuring the heat flux supplied to a test sample as a function of time or temperature, while the test sample is subjected to a temperature schedule under a specified atmosphere. A reaction is marked by the release of energy from the sample, resulting in an exothermic peak in the heating curve. Integration of the recorded peak area as a function of time gives a measure of the energy of the reaction. Applies to phenolic resins with exothermic behaviour, such as resols or mixtures of novolaks with hexamethylenetetramine or other curing agents.