【摘要】 采用动态力学分析 (Dynamic mechanical analysis,DMA)方法 ,研究了 F2 314、F2 311、F2 6 0 3、F2 46 3等四种氟聚物的动态力学的频率与玻璃化温度关系。并用最小二乘法对相关频率与玻璃化温度进行线性回归 ,得到了这四种氟聚物的动态力学活化能数据。这些活化能在一定程度上反映了氟聚物链段构象运动的受阻性。更多还原

【Abstract】 Relationships between frequencies and glass transition temperature of four fluoropolymers (F2314、F2311、F2603、F2463) were studied, by dynamic mechanical analysis (DMA) method in this paper. Linear regressions of the relations between the frequencies and glass transition temperatures concerned were made by least square method and the activation energies for these fluoropolymers by DMA were acquired, the activation energies reflect resistance to the conformational movement of these fluoropolymers’ segments in some degree.更多还原