测定温度-形变曲线是研究高聚物力学性质的一种重要方法。在高聚物试样上加以一定的荷重,并改变温度测定在各温度条件下的相对形变,再以形变对温度作图即可得到温度-形变曲线。在曲线的两个转折范围内可以定出玻璃化转变温度 T_g 和流动温度 T_f,从而可以估计被测试样材料的适用范围和加工条件。此外曲线还可以用来配合高聚物结构的研究和估计分子量。必须指出,T_g 和 T_f 仅标志高聚物分子运动状态的区分。在 T_g 以上分子链段开始作局部运动,因此高分子表现为高弹状态,而在 T_f 以上整个分子可以 Determination of temperature - deformation curve is to study the mechanical properties of polymers is an important method. In the polymer sample to a certain load, and change the temperature measured at various temperatures relative to the deformation, and then the deformation of the temperature mapping can be obtained temperature - deformation curve. The glass transition temperature T_g and the flow temperature T_f can be determined within the two transitions of the curve so that the applicable range and processing conditions of the material to be tested can be estimated. In addition the curve can also be used to study the polymer structure and estimate the molecular weight. It must be pointed out that T_g and T_f only mark the distinction between polymer kinematic states. In T_g above the molecular chain began to make local movement, so the polymer showed high elastic state, and in T_f above the entire molecule can