Polymorphic Transition of Pre-oriented Polybutene-1 under Tensile Deformation:In Situ FTIR Study

作     者：Zhen Zhang Xin Chen Chuang Zhang Chun-Tai Liu Zhen Wang Yan-Ping Liu Zhen Zhang;Xin Chen;Chuang Zhang;Chun-Tai Liu;Zhen Wang;Yan-Ping Liu

作者机构：National Engineering Research Center for Advanced Polymer Processing TechnologyKey Laboratory of Materials Processing and Mold(Zhengzhou University)Ministry of EducationZhengzhou UniversityZhengzhou 450002China National Center for International Research of Micro-nano Molding Technology&Key Laboratory for Micro Molding Technology of Henan ProvinceZhengzhou UniversityZhengzhou 450002China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2020年第38卷第8期

页      面：888-897,I0008页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51803189,51503186) the Postdoctoral Science Foundation of China(No.2018M630832) 

主　　题：Polybutene-1 Tensile deformation FTIR Crystalline transition External work 

摘      要：Deformation-induced phase transition of FormⅡto FormⅠin polybutene-1(PB-1)has been investigated by time-resolved Fourier transform infrared(FTIR)spectroscopy over a wide temperature range from 25℃to 105℃.The initial film sample containing orientated lamellae is prepared by pre-stretching of PB-1 melt followed by *** is to realize a homogeneity of subsequent deformation at the mesoscale of lamellar stacks by avoiding large-scale *** deformation induced phase transition is recognized to occur with two stages:first,FormⅡundergoes the lamellar fragmentation,slipping or local melting after yielding to activate its transition to FormⅠ,which may be realized by releasing the restrictions on chains translational movements in crystalline phase;second,the phase transition proceeds with a continuous dissipation of external work and determines the tensile mechanical response of *** quantify the relationship between crystalline transition of FormⅡto FormⅠand external tensile field,a simple kinetic equation is well established based on FTIR *** equation can describe not only the dependence of crystal transitional degree on applied specific work,but also the retardation effect of elevating temperature on phase transition.