一、緒言高分子化合物在一定升溫速率下所获得的溫度-形变曲綫或溫度-体积曲綫表现有轉折点,在此溫度附近,表征高聚物特性的一些物理量出现不連续的轉变,此种现象被称为玻璃化轉变(glass transition),亦有称二級轉变(second order transition),或表观二級轉变(apparcnt second order transition)。由于高聚物的玻璃化转变不是热力学平衡現象,它随測定方法及升温速 I. INTRODUCTION The temperature-deformation curves or temperature-volume curves of polymer compounds show a turning point at a certain heating rate. Some physical quantities that characterize the properties of polymers appear discontinuous transitions at this temperature, Phenomena are called glass transitions, and also called second order transitions or apparcnt second order transitions. As the glass transition of polymers is not thermodynamic equilibrium phenomenon, with the determination of the method and the heating rate