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/A12O3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/A12O3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/A12O3对环氧灌封材料的力学性能起到了明显的改善作用:PGMA/A12O3对环氧灌封料的增韧效果明显优于未改性的A12O3,且随PGMA/A12O3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/A12O3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.
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