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不同结构的ACR核壳粒子增韧聚碳酸酯的机理
引用本文:徐会军,唐颂超,杨龙.不同结构的ACR核壳粒子增韧聚碳酸酯的机理[J].医学教育探索,2009(3):276-281.
作者姓名:徐会军  唐颂超  杨龙
作者单位:华东理工大学材料科学与工程学院,上海市先进聚合物材料重点实验室;华东理工大学材料科学与工程学院,上海市先进聚合物材料重点实验室;华东理工大学材料科学与工程学院,上海市先进聚合物材料重点实验室
摘    要:用自制的核壳结构丙烯酸酯类共聚物(ACR)与聚碳酸酯(PC)共混制成共混材料(PC-ACR),考察了ACR的粒径以及ACR的壳层引入甲基丙烯酸缩水甘油酯(GMA)单体后对PC-ACR共混物冲击强度的影响。壳层引入GMA的ACR提高PC缺口韧性的效果并不明显;而ACR的粒径对PC-ACR冲击韧性的影响较大。运用J积分断裂韧性分析比较了ACR粒径对共混物断裂过程中弹性形变区塑性形变区能量吸收能力的影响。塑性形变作为主要能量吸收途径在提高共混物韧性方面起主要作用,粒径为177.5 nm的ACR提高PC的断裂韧性效果最好,与悬臂梁冲击实验得到的冲击强度数据一致。

关 键 词:聚碳酸酯    ACR    GMA    冲击强度    断裂韧性
收稿时间:7/3/2009 12:00:00 AM

Mechanism of Polycarbonate Toughened by ACR Core-Shell Particles with Different Structures
Abstract:PC-ACR blends was prepared by blending polycarbonate (PC) with acrylic copolymer (ACR) which was self made. Influence of modifier size and glycidyl methacrylate (GMA) introduced into shell of ACR on impact strength of PC ACR blends were investigated. Increasing of notch toughness of PC-ACR which ACR shell had introduced GMA is not effective. Whereas diameter of ACR has great influence on impact toughness of PC-ACR blends. The J integral fracture toughness analysis was applied to compare influence of modifier size with energy absorption ability of elastic deformation and plastic deformation. Plastic deformation as main energy absorption routes plays a major role in enhancing toughness of blends. ACR with size of 177.5 nm is found to be mostly effective, which is in accordance with the impact strength acquired from izod impact test.
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