SEBS增容等规聚丙烯/间规聚苯乙烯共混体系的结构与性能  

Morphology and Mechanical Properties of Isotactic Polypropylene/Syndiotactic Polystyrene Blends Compatibilized by SEBS Copolymers

作　　者：陈斌[1] 郭丹[1] 赵丽萍[2] 蔡洪光[2] 张春雨[2] 张学全[2] 

机构地区：[1]辽宁省高校"高分子材料应用技术"重点实验室沈阳化工大学,辽宁沈阳110142 [2]中国科学院长春应用化学研究所高分子工程实验室,吉林长春130022

出　　处：《高分子材料科学与工程》2011年第1期104-107,共4页Polymer Materials Science & Engineering

摘　　要：用3种组成相近而分子量不同的苯乙烯-乙烯/丁烯-苯乙烯共聚物(SEBS)作为增容剂,对等规聚丙烯/间规聚苯乙烯(iPP/sPS)共混物进行增容。研究了共聚物的分子量对iPP/sPS共混物的形态结构及力学性能的影响。结果表明,中、低分子量的SEBS具有较好的增容作用,能有效提高共混物的拉伸强度;而高分子量的SEBS则能显著改善共混物的韧性。用SEM观察了增容剂在共混物中的分布情况,揭示了共混物的力学性能不仅取决于增容剂的界面活性,而且还与增容剂在共混物中的分布密切相关。The effects of three triblock copolymers of poly [styrene-b-（ethylene-co-butylene）-b-styrene]（SEBS） of different molecular weight（MW） on the morphology and tensile strength of isotactic polypropylene/syndiotactic polystyrene（PP/sPS,80/20） blend were investigated.Morphology observation shows that both the medium MW and the lower MW SEBS are more effective than the higher MW SEBS in compatibilizing the blends.Tensile test reveals that both the medium and low MW compatibilizers lead to a significant improvement in tensile strength,while the higher MW compatibilizer is efficient in increasing the elongation at break of the blends.The localization of compatibilizers in the blends was observed by means of scanning electron microscope（SEM） and the correlation between the distribution of the compatibilizers and mechanical properties of the blends was evaluated.

关 键 词：间规聚苯乙烯 等规聚丙烯 形态结构 增溶剂 

分 类 号：TQ314.269[化学工程—高聚物工业]