聚乙烯/纳米蒙脱土复合材料的非等温结晶行为  

Nonisothermal Crystallization Behavior of PE/Nano-MMT Composite

作　　者：牛秋成[1] 李三喜[1] 王松[1] 张爱玲[1] 

机构地区：[1]沈阳工业大学理学院,辽宁沈阳110870

出　　处：《塑料》2013年第4期18-20,27,共4页Plastics

基　　金：辽宁省聚合物催化合成技术重点实验室专项基金资助项目[辽科发(2010)36号]

摘　　要：原位聚合法制备了不同蒙脱土含量的聚乙烯(PE)/纳米蒙脱土(MMT)复合材料。用透射电镜分析了MMT在PE基体中的分散情况,结果表明:随着MMT含量的增加,复合材料的结构从剥离型转变为剥离型和插层型混合结构。用DSC分析了PE/纳米MMT复合材料的非等温结晶行为,结果表明:复合材料的非等温结晶行为符合Avramin方程,随着MMT含量的增加,Avramin方程指数(n)减小,结晶时间(t1/2)增加。PE/nano-MMT composite were prepared by in-situ polymerization. The nanoscale dispersion of MMT layers in the polyethylene matrix was demonstrated by TEM, and the transformation of PE/nano-MMT composite from exfoliated structure to intercalated and exfoliated concomitant structure was revealed with the increase of MMT content in PE/nano-MMT composite. Nonisothermal crystallization behavior characterized by DSC showed that the crystallization behavior of PE/MMT nanocomposite accorded with the Avramin equation. The analysis of crystallization kinetics profile of PE/nano-MMT composite by a modified Avrami model indicated that the Avramin exponents（n） decreased and the crystallization half time increased as the MMT content in PE/nano-MMT composite increased.

关 键 词：纳米复合材料 聚乙烯 蒙脱土 非等温结晶行为 异相成核 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]