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由傅里叶导热定律结合Tools-Narayanaswamy-Moynihan(TNM)松弛模型提出了一种计算聚合物样品内温度分布的方法.对PS的计算结果表明温度梯度随样品厚度、升温速率增大而增大,对于1.0 mm的PS以1 K/min降温后再以10 K/min升温时样品内部最大温差为0.882 K.在此基础上提出了不同样品厚度、不同热处理条件下聚合物测定比热的计算方法,结果表明计算结果与实测数据基本一致.
A method to calculate the temperature distribution in polymer samples is proposed by the Fourier-thermal law combined with the relaxation model of Tools-Narayanaswamy-Moynihan (TNM). The calculated results show that the temperature gradient increases with the increase of sample thickness and heating rate , The maximum temperature difference inside the sample after cooling at 1 K / min for 1.0 mm PS and then increasing at 10 K / min was 0.882 K. Based on this, the calculation of the specific heat of the polymer under different heat treatment conditions Method, the results show that the calculated results and the measured data are basically the same.