由实验中得到的ＰＭＭＡ的模量～温度曲线发现的“异常”现象出发，从力学角度定义了高聚物的热弹逆变现象，并阐明了高分子的内旋转是产生这一现象的机理，找到了影响热弹逆变现象的几个因素，最后还给出了如下结论：即热弹逆变现象普遍存在于大多数高聚物材料中，而经典的模量～温度曲线只是热弹逆变现象的一个特例。 Based on the “anomaly” phenomenon found in the modulus-temperature curve of the PMMA obtained in the experiment, the thermoelastic inverse phenomenon of the polymer is defined from the mechanical point of view, and the mechanism of this phenomenon is explained that the internal rotation of the polymer , Found several factors that affect the phenomenon of thermo-bomb inversion, and finally gives the following conclusion: thermo-bomb inversion phenomenon prevails in most polymer materials, while the classical modulus-temperature curve is only a hot bomb A special case of the phenomenon of inversion.