文献类型：期刊文献

英文题名：Micromechanical simulation of molecular architecture and orientation effect on deformation and fracture of multiblock copolymers

作者：Deng, Shengwei[1,2];Huang, Yongmin[1,2];Lian, Cheng[1,2];Xu, Shouhong[1,2];Liu, Honglai[1,2];Lin, Shaoliang[3]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：55

期号：18

起止页码：4776

外文期刊名：POLYMER

收录：;EI(收录号：20143618127277);WOS:【SCI-EXPANDED(收录号:WOS:000341474000026)】；

基金：Financial support for this work was provided by the National Natural Science Foundation of China (No. 91334203), the 111 Project of Ministry of Education of China (Grant B08021) and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Multiblock copolymers; Mechanical properties; Lattice spring model

摘要：Multiblock copolymers containing a large number of blocks have distinct microstructures and mechanical responses that are different from that of conventional diblock and triblock copolymers. A combined simulation method that utilized MesoDyn for morphologies and probabilistic lattice spring model (LSM) for mechanical properties was adopted in this work. Simulation results show that tensile strength increases dramatically with an increase in the number of blocks within "hard-soft" multiblock copolymers. This phenomenon can be described by the occurrence of bridging and looping chain conformations in experiment. One-dimensional lamellae were built to provide an ideal morphology for studying the influence of lamellar orientation on multiblock copolymer mechanical properties. During tensile tests different failure processes were observed with two kinds of interface strength that corresponded to a difference in chain structures (diblock, triblock or multiblock copolymers). These studies provide an efficient method for correlating the complex morphologies to the mechanical response of multiblock copolymers. (C) 2014 Elsevier Ltd. All rights reserved.