EPDM-g-SAN对EPDM/SAN共混体系形态及力学性能的影响  

EFFECT OF ADDITION OF EPDM GRAFTED SAN COPOLYMER ON MORPHOLOGY, MECHANICAL PROPERTIES OF EPDM/SAN BLENDS

作　　者：刘国栋[1] 张胜文[1] 瞿雄伟[1] 商淑瑞[1] 张留成[1] 

机构地区：[1]河北工业大学化工学院高分子科学与工程研究所,天津300130

出　　处：《高分子材料科学与工程》2004年第3期99-102,共4页Polymer Materials Science & Engineering

基　　金：河北省教育厅博士基金资助

摘　　要：研究了接枝共聚物EPDM-g-SAN对EPDM/SAN共混体系的形态和力学性能的影响。扫描电镜和粒径统计分析发现,随着EPDM-g-SAN接枝共聚物的加入,共混体系EPDM分散相的粒径变小、粒径分布变窄,且共混物的缺口冲击强度明显提高,发生了脆韧转变;基体的塑性变形显著增加,表明接枝共聚物在不相容两相聚合物间起到了良好的增容作用。冲击断面扫描电镜分析证实了韧性增加的机理。Effect of addition of EPDM grafted SAN copolymer on morphology, mechanical properties of EPDM/SAN blends was studied. Morphological observations indicate a finer dispersion of the EPDM particles in the SAN/EPDM/EPDM-g-SAN blends, and particle size distribution becomes narrower. Meanwhile, it is found that the ratio of (17.5)/10 by mass of the EPDM/ EPDM-g-SAN blend is more effective in increasing the impact strength than that of (17.5)/8. This result is consistent with Wu′s model of the critical inter-particle distance, which is an important parameter for brittle-tough transition. The observation of scanning electron microscopy approves above results.

关 键 词：EPDM 三元乙丙橡胶 接枝反应 苯乙烯 丙烯腈 接枝共聚物 

分 类 号：TQ333.4[化学工程—橡胶工业]