γ辐射对PP/SBS的流变性能和内耗的影响  

Analysis of internal friction and rheological properties of PP/SBS blends irradiated by γ rays

作　　者：贾少晋[1] 张志成[1] 刘卫[1] 葛学武[1] 邓增强[1] 冯建平[1] 徐相凌[1] 

机构地区：[1]中国科学技术大学,合肥230026

出　　处：《核技术》2000年第8期540-544,共5页Nuclear Techniques

基　　金：国家自然科学基金资助!(298040010)

摘　　要：研究了一系列不同含量的ＳＢＳ与聚丙烯的共混物的辐射硫化效应．辐照一定剂量后，由于辐射交联和裂解的进行，使ＰＰ／ＳＢＳ的流变性能和结构及内耗行为发生大的变化，ＰＰ与ＳＢＳ两者玻璃化转变温度间距离变小，从而改善了ＰＰ／ＳＢＳ的相容性。ＰＰ和ＳＢＳ在辐射引发自由基的情况下，分散相ＳＢＳ形成交联结构，连续相ＰＰ发生裂解，体系的表观粘度下降，但ＰＰ的玻璃化转变激活能仍然提高了。In this paper, the rheological properties of PP/SBS irradiated by rays were studied. The viscosity of irradiated PP/SBS was lower than that of unirradiated PP/SBS, which implied that the irradiated blends could be easily processed by injection molding. The effects of radiation on the segmental relaxation of PP/SBS were studied. The glass state temperature of PP and SBS became closer because of the irradiation.

关 键 词：SBS 聚丙烯 Γ辐照 共混 流变性能 辐射硫化效应 

分 类 号：TQ330.13[化学工程—橡胶工业] O631.34[理学—高分子化学]