【作者】 何鹏； 俞炜； 周持兴；

【Author】 HE Peng,YU Wei,ZHOU Chixing (Department of Polymer Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240)

【机构】 上海交通大学高分子科学与工程系；

【摘要】 <正>热塑性弹性体由于其优异的综合性质,广泛应用于许多领域。以嵌段共聚物为代表的热塑性弹性体,由于微相分离作用,常呈现为纳米尺度的微观有序结构。当嵌段共聚物在熔融加工过程中,材料的流动与形变会影响微相纳米结构或其排列,进而影响到加工后嵌段共聚物的机械性质。本文主要研究烯烃嵌段共聚物的微相分离行为与结晶行为。图1显示了两种更多还原

【Abstract】 The mesophase separation and crystallization behavior of two typical olefin block copolymer(OBC) were studied.It was found that one OBC showed evident failure in the time-temperature superposition(TTS) in shifted Cole-Cole plot,while TTS obeys quite well in the other OBC.Such behavior was ascribed to the concentration fluctuation and even mesophase separation from disordered melt.The spherulites in the OBC without phase separation were much larger than those in phase separated OBC,which was ascribed to the hindrance effect of phase separated morphology on the growth of spherulites.更多还原