【摘要】 用ＤＭＡ（动态机械热分析仪）研究了几种高聚物的低温动态力学性能，测定了样品的动态力学性能参数，并且应用动态力学性能的ＴＴＳ（时温叠加）原理，求得了ＷＬＦ方程的常数Ｃ１和Ｃ２，由Ｃ１和Ｃ２进一步计算出材料的脆性参数，同时从分子结构角度解释了本文所研究试样之间贮能模量和脆性参数的差别。更多还原

【Abstract】 In this paper, the dynamic mechanical performance of some polymers was investigated by DMA. The parameters of dynamic mechanical performance of samples were determined. Base on the time temperature superposition principle of dynamic mechanical performence, constants C 1 and C 2 of WLF equation were obtained, and the fragility parameters of samples were calculated form C 1 and C 2. The differences of storage modulus and fragility parameter of samples were explained form the point of view of molecular structure.更多还原