机构地区: 上海交通大学化学化工学院
出 处: 《高分子材料科学与工程》 2002年第6期106-110,共5页
摘 要: 利用 DSC法研究了低等规度聚丙烯 ( LIPP)的等温结晶动力学。根据 Avrami方程求出了各个结晶温度下的结晶动力学参数 k( T)、n和 t1/ 2 ,研究了 L IPP的结晶度及结晶速率与结晶温度的关系。利用Hoffman等温结晶理论 ,求出 LIPP的 σe 为 3.0 7× 10 -2 J/ m2 。 Isothermal crystallization kinetics of a low isotactic polypropylene(LIPP) sample at different crystallization temperatures have been investigated by employing differential scanning calorimetry(DSC). The crystallization kinetic parameters k(T), n and t 1/2 in Avrami equation of different crystallization temperature were obtained, and the relation between the crystallinity of LIPP and the crystallization temperatures was also studied. By using the Hoffman isothermal crystallization theory, σ e of LIPP was approached, the value of which is 3.07×10 -2 J/m 2.
领 域: [化学工程]