碳酸钙填料对不饱和聚酯树脂体积收缩的影响及其机制

复合材料学报, 2008, 25(5): 33-38.

碳酸钙填料对不饱和聚酯树脂体积收缩的影响及其机制

陆昶 ^1, , 燕小然 ^2, , 邹犁野 ^3, , 高常有 ^4,

1.浙江大学,高分子系,杭州,310027;河南科技大学,化工与制药学院,高分子科学与纳米技术校重点实验室,洛阳,471003

2.河南科技大学,化工与制药学院,高分子科学与纳米技术校重点实验室,洛阳,471003

3.杭州杭申绝缘材料有限公司,杭州,311234

4.浙江大学,高分子系,杭州,310027

基金项目: 河南科技大学校科研和教改项目(2006ZY029) 河南科技大学校科研和教改项目(05-071)

关键词：填料 , 不饱和聚酯 , 体积收缩 , 偶联剂 , 机制

Effect of CaCO3 fillers on volume shrinkage of unsaturated polyester and their mechanism

研究了CaCO3填料对不饱和聚酯树脂(UP)体积收缩性能的影响,通过SEM、DSC、TG和溶胀实验研究了其作用机制.填料的加入导致填料/UP复合体系的体积收缩率先上升,后下降;用偶联剂对填料进行表面处理后加入复合体系中发现,复合体系的体积收缩率变小.填料主要通过以下3个方面影响复合体系的体积收缩:填料取代了部分树脂,有利于体系的体积收缩率下降;复合体系固化后在填料及UP界面处形成空隙,有利于复合体系体积收缩率的降低;填料抑制苯乙烯的挥发,导致体系中不饱和聚酯固化密度增大,使体系体积收缩率上升.偶联剂的加入增加了填料与树脂的界面作用力,且可使苯乙烯的挥发量增加,导致其交联密度下降,使体积收缩率下降.

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