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玻璃纤维增强聚丙烯结晶动力学研究
引用本文:崔新宇,周晓东,戴干策.玻璃纤维增强聚丙烯结晶动力学研究[J].华东理工大学学报(自然科学版),2001,27(6):639-642.
作者姓名:崔新宇  周晓东  戴干策
作者单位:华东理工大学聚合物加工研究室,上海,200237
基金项目:国家 8 6 3计划资助项目
摘    要:通过DSC方法研究了玻璃纤维增强聚丙烯复合体系的结晶行为,探讨了体系等温及非等温结晶动力学,采用Mandelkern方法和Jeziorny方法对体系的非等温结晶动力学进行了处理。结果表明:玻璃纤维的引入改变了聚丙烯的结晶温度和结晶度,对聚丙烯的结晶有成核作用,短玻璃纤维的成核作用强于玻璃纤维毡;聚丙烯及玻璃纤维增强聚丙烯的等温结晶在相当大的结晶范围内符合Avrami方程;由Jeziorny方法得出的单位冷却速率非等温结晶能力参数Gc不随冷却速率的改变而变化,能较好地反映结晶过程,可用该方法材料结晶动力学进行计算。

关 键 词:聚丙烯  玻璃纤维  等温结晶  非等温结晶  结晶动力学  热塑性复合材料  结晶度
文章编号:1006-3080(2001)06-0639-04
修稿时间:2000年12月15

Crystallization Kinetics of Glass Fiber Reinforced Polypropylene
Abstract:The crystallization behavior, isothermal crystallization kinetics and non isothermal crystallization kinetics of glass fiber reinforced polypropylene were studied by DSC. Mandelkern method and Jeziorny method were used to analyze the non isothermal crystallization. The results show that the presence of glass fibers affects the temperature and the rate of crystallization of the polypropylene, the glass fibers have an ability to nucleate crystallization, and short glass fiber has more effect than glass fiber mat to PP matrix. Avrami equation is valid for analyzing the isothermal crystallization of glass fiber reinforced polypropylene. The crystallization parameter G C from Jeziorny method does not change with the cooling rate, and Jeziorny method fits this non isothermal crystallization well. So the kinetics of non isothermal crystallization of gf PP can be calculated by this method.
Keywords:polypropylene  glass  fiber  isothermal crystallization  non  isothermal crystallization  crystallization  kinetics
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