文献类型：期刊文献

英文题名：Mechanical properties of high-performance elastomeric nanocomposites: a sequential mesoscale simulation approach

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

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：4

期号：108

起止页码：63586

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20144900299200);WOS:【SCI-EXPANDED(收录号:WOS:000345701500099)】；

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：Stiffness matrix - Stress relaxation - Block copolymers - Nanocomposites - Polymer matrix composites

摘要：The incorporation of nanoparticles into elastomeric block copolymers affords engineers an opportunity to obtain polymer nanocomposites that potentially rival the most advanced materials in nature. A computationally efficient simulation method that utilized MesoDyn for the morphologies and the lattice spring model (LSM) for the mechanical properties was adopted in this work. The simulation results show that the selective distribution of nanoparticles in hard or soft segment microdomains of block copolymers will narrow the phase domain size in bicontinuous structures. The Zener model was incorporated into pure elastic LSM to capture the stress relaxation behavior. Mechanical tests reveal that the stress transfer between the polymer matrix and nanoparticles in different composites is critical to the stiffness enhancement. In dispersed structures, adding nanoparticles in a hard microdomain can increase the elastic modulus and maintain high extensibility without impairing its viscosity dramatically. The methods developed in this work yield guidelines for formulating elastomeric nanocomposites with desired macroscopic mechanical responses.