纳米SiO_2/MC尼龙6原位复合材料等温结晶行为的研究  

Study on Isothermal Crystallization Behavior of Nano-silica/MC PA6 In-situ Composite

作　　者：蔡力锋[1] 林志勇[2] 

机构地区：[1]莆田学院环境与生命科学学院,福建莆田351100 [2]华侨大学材料科学与工程学院,福建泉州362021

出　　处：《塑料科技》2010年第4期61-64,共4页Plastics Science and Technology

基　　金：国家自然科学基金项目(50673030);福建省自然科学基金项目(E0710014)

摘　　要：将纳米SiO2均匀分散在己内酰胺单体熔体中,采用阴离子开环聚合法制备了纳米SiO2/单体浇铸(MC)尼龙6原位复合材料。通过差示扫描量热仪(DSC)、Avrami方程、Lauritizen-Hoffmann方程对复合材料的等温结晶行为进行了研究。结果表明:纳米SiO2的引入改变了基体MC尼龙6的成核机理和生长方式;低含量的纳米SiO2阻碍了MC尼龙6的结晶行为,高含量的纳米SiO2降低了MC尼龙6的结晶活化能,提高了其球晶生长速率,并促进了其结晶行为。Nano-SiO2 was dispersed uniformly in caprolactam melt, and the nano-SiO2/MC PA6 in-situ composite was prepared by anionic ring-opening polymerization. The isothermal crystallization behavior of the composite was studied by DSC, Avrami equation and Lauritizen-Hoffmann equation. The results show that the introduction of nano-SiO2 changes the nucleation mechanism and crystal growth of MC PA6 matrix; low content of nano-SiO2 hinders the crystallization of MC PA6, while high content of nano-SiO2 decreases the crystallization activation energy of MC PA6, increases the growth rate of spherulites, and promotes the crystallization of MC PA6 matrix.

关 键 词：纳米二氧化硅 单体浇铸尼龙6 原位复合材料 等温结晶 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]