EPDM-g-MS对MS树脂的增韧作用  

Toughening Effect of EPDM-g-MS on MS Resin

作　　者：付锦锋[1] 王炼石[1] 张安强[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《中国塑料》2007年第10期22-25,共4页China Plastics

摘　　要：用溶液聚合法合成三元乙丙橡胶(EPDM)与甲基丙烯酸甲酯(MMA)及苯乙烯(St)接枝共聚物(EPDM-g-MS),用其与 MMA/St 共聚物(MS 树脂)共混制备高抗冲塑料(MES),研究了 EPDM-g-MS 对 MS 树脂的增韧作用,用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对 MES 的微观相结构进行了分析。结果表明:EPDM-g-MS 的接枝率、接枝链的极性及 EPDM 在 IVIES 中的含量是影响其对 MS 树脂增韧效果的主要因素。增加 EPDM-g-MS 的接枝率、增强其接枝链的极性及增加其用量均可提高 MES 的缺口冲击强度。MES 相结构的 TEM 分析和冲击断面形态的 SEM 分析表明,随着 EPDM 在 MES 中的含量的增加,EPDM-g-MS 分散相的粒径增大,粒面距离缩短,导致MES 的增韧机理由空穴化向轻度剪切屈服转变,MES 的缺口冲击强度随之而提高。EPDM-g-MS, synthesized by solution grafting of methyl methaCrylate and styrene onto EPDM, was blended with MS resin leading to MES. The toughening effects of EPDM-g-MS on MS resin were studied. The phase structure of IVIES was analyzed by SEM and TEM. It showed that the graft ratio, the polar of graft chain on EPDM-g-MS, and content of EPDM-g-MS in IVIES were the main factors of influencing the toughening effect on MS resin. Increasing graft ratio, polar of graft chain, and content of EPDM-g-MS in IVIES increased the notched Izod impact strength of MES. TEM and SEM showed that with increasing EPDM-g-MS content in MES, the particle size of EPDM-g-MS phase increased, and thus the ligand distance decreased which resulted in the toughening mechanism of MES from cavitation to slight shear yielding, and caused the increase of notched Izod impact strength. K

关 键 词：三元乙丙橡胶-甲基丙烯酸甲酯-苯乙烯接枝共聚物 甲基丙烯酸甲酯-苯乙烯共聚物 相结构 增韧机理 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]