Elongational Flow-induced Crystallization of Poly(L-lactic acid)Telechelic Ionomers

作     者：Fan Liu Shao-Yong Huang Jian Tang Quan Chen Fan Liu;Shao-Yong Huang;Jian Tang;Quan Chen

作者机构：State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China 

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

年 卷 期：2024年第42卷第12期

页      面：1957-1965,I0010页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 081701[工学-化学工程] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.22173095) 

主　　题：Polylactides telechelic ionomers Flow-induced crystallization Strain-induced dissociation 

摘      要：In this study,we prepared unentangled and slightly entangled poly(L-lactic acid)telechelic ionomer samples(Mn=5 and 16 kg/mol)based on sodium sulfonate *** telechelic samples exhibit extremely slow crystallization kinetics below the melting temperature T_(m) and above the glass transition temperature T_(g),which enables us to examine the linear viscoelasticity of the ionomer melt samples *** application of either the shear flow(at 85℃)or elongational flow(between 70 and 90℃)strongly accelerates the crystallization,leading to strong strain hardening and formation of highly orientedα*** on the relative average rates of the strain-induced dissociation and strain-induced crystallization,the stress evolution can be classified into two cases,and the critical work for strain-induced crystallization is higher in case where the strain-induced dissociation occurs earlier than the strain-induced crystallization.