摘要
用2种分子量不同的苯乙烯-(乙烯/丁烯)-苯乙烯三嵌段共聚物(SEBS)和一种苯乙烯-b-乙烯/丁烯(SEB)两嵌段共聚物为增容剂,对高密度聚乙烯(HDPE)/间规聚苯乙烯(sPS)共混物进行增容。采用扫描电镜(SEM)及拉伸试验研究了增溶剂的分子量及结构对共混物形态结构及力学性能的影响。结果表明:3种增容剂SEBS(SEB)均可有效地降低sPS分散相的尺寸并增加HDPE/sPS共混物的界面强度,从而提高其力学性能。sPS的掺入可以显著提高HDPE的耐热性能。
Two tribleck copolymers of poly[styrene - b - （ethylene - co - butylene） - b - styrene ] （SEBS） of different molecular weights and one dibleck eopolymer of poly styrene- b- （ethylene- co- butylene） （SEB） were used to eompatibilize high density polyethylene/syndiotactic polystyrene （HDPE/sPS） blend. Morphology observation showed that phase size of the dispersed sis particles was significantly reduced on addition of all the three copolymers and the interfaeial adhesion between the two phases was dramatically enhanced. Tensile strength Of the blends increased at lower eopolymer content but decreased with increasing eopolymer content. The elongation at break of the blends was improved and sharply increased with increment of the eopolymers, particularly at the high eopolymer content. Measurements of Vieat softening temperature of the HDPE/sPS blends show that heat resistance of HDPE is greatly improved upon incorporation of 20 wt % sPS.
出处
《当代化工》
CAS
2007年第4期407-410,共4页
Contemporary Chemical Industry
基金
国家自然科学基金项目(批准号:59503002)
关键词
间规聚苯乙烯
共混物
增容剂
形态结构
syndiotaetie polystyrene
blend
eompatibilizer
morphology
