低密度聚乙烯/乙丙烯三元共聚(LDPE/EPO)共混体系的结晶动力学  

CRYSTALLIZATION KINETICS OF LDPE/EPO BLENDS UNDER ISOTHERMAL AND NON-ISOTHERMAL CONDITIONS

作　　者：高焕[1] 莫志深[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理开放实验室,长春邮政编码130022

出　　处：《高分子学报》1992年第2期162-168,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：用DSC方法研究了LDPE/EPO共混体系的等温及非等温结晶动力学,对LDPE/EPO共混体系的等温结晶动力学研究表明,共混物是三维生长的异相成核,共混物在各个结晶温度下的结晶过程都是以方式K_g(Ⅱ)进行的.采用联系Avrami方程和Ozawa方程导出的新非等温结晶动力学方程,处理了LDPE/EPO共混体系,得到了非等温结晶过程的一些基本参数,新方程很好地描述了此共混体系的非等温结晶动力学过程.The isothermal crystallization kinetics of LDPE/EPO blends have been investigated by DSC. It indicated that blends are of three-dimensional growth a thermal nucleation. The nucleation process in every crystallization temperature belong to regime II. A new kinetic equation of non-isothermal crystallization was derived by combining Avrami and Ozawa equations. Some parameters of crystallization kinetics can be obtained from the new kinetic equation. The kinetics of non-isothermal crystallization of a LDPE/EPO blends has been investigated by using differential scanning calorimeter. The experimental results analyzed showed agreements with the new kinetic equation.

关 键 词：LDPE/EPO 共混物 结晶行为 

分 类 号：O63.12[理学—高分子化学]