接枝微粒PGMA/Al_2O_3对环氧树脂电子灌封材料的增强增韧作用  

Effect of Grafted Particles PGMA/Al_2O_3 on Toughness and Reinforce of Encapsulating Materials of Epoxy Resin

作　　者：王蕊欣[1] 高保娇[1] 

机构地区：[1]中北大学化学工程系,山西太原030051

出　　处：《高分子材料科学与工程》2009年第3期53-56,共4页Polymer Materials Science & Engineering

基　　金：山西省研究生优秀创新项目(20081065);中北大学青年科学基金项目;太原市科技项目计划大学生创新创业专项

摘　　要：采用甲基丙烯酸缩水甘油酯对Al2O3颗粒进行接枝改性,制备了接枝微粒,考察了PGMA/Al2O3对环氧电子灌封材料力学性能的影响,并利用扫描电镜观察了环氧灌封材料经PGMA/Al2O3填充前后的冲击断面的形貌变化。研究结果表明,经接枝改性后,接枝微粒PGMA/Al2O3对环氧灌封材料的力学性能起到了明显的改善作用:PGMA/Al2O3对环氧灌封料的增韧效果明显优于未改性的Al2O3,且随PGMA/Al2O3填充量的增大,冲击韧性先增大后减小,在填充量较小(0.7%)时,冲击韧性最大;屈服强度也随PGMA/Al2O3的加入出现一最佳值;并随接枝微粒PGMA/Al2O3的接枝率的增加,其冲击韧性和屈服强度明显增大。Grafted particles PGMA/Al2O3were prepared by grafting poly-glycidyl methacrylate （GMA） onto Al2O3 with the method of ＂Grafting from＂. The morphology and mechanical properties of epoxy resin blended with PGMA/ Al2O3 particles were studied. The results show that the toughening effect of PGMA/Al2O3 particles on epoxy resin is much better than that of unmodified Al2O3 particles. The impact strength and yielded strength of epoxy resin is significantly improved when a smaller amount of grafted particles is added. In addition, the higher the grafting degree of PGMA/Al2O3 particles is, the greater the impact strength and yielded strength of epoxy resin is.

关 键 词：接枝改性 氧化铝 聚甲基丙烯酸缩水甘油酯 环氧树脂 增强增韧 

分 类 号：TQ316.343[化学工程—高聚物工业]