高校化学工程学报2024，Vol.38Issue(6)：963-970,8.DOI:10.3969/j.issn.1003-9015.2024.06.014
电场作用下二元高分子共混体系微观组织演化的相场模拟
Phase-field simulation of microstructure evolution in binary polymer blends under electric fields
摘要
Abstract
Polymer composites exhibit superior properties that are absent in individual polymeric materials.To investigate the microstructural evolution and kinetic processes of binary polymer blends under electric fields(E-fields),numerical simulation based on the morphology and anisotropy parameter was carried out by a phase-field method.The modified nonlinear Cahn-Hilliard-Cook(CHC)diffusion equation was numerically solved by adopting high-accuracy semi-implicit Fourier spectral method.The simulated results show that the application of E-field remarkedly affects the phase-separating structure and kinetic process of polymer blends.Under the applied E-fields,the anisotropy parameter gradually increases with time and then reaches to an equilibrium,and stronger E-field leads to larger initial values of anisotropy parameter.In addition,the effect of initial composition on the orientation kinetics of E-field is significant and for the system with the critical composition,the orientation kinetic process is faster and stronger than the system with an off-critical composition.This study reveals the mechanism of E-field action on the polymer blend undergoing phase separation.Meanwhile,it can be used as a theoretical basis to design and guide the synthesis of polymer composites with anisotropic microstructures and superior properties.关键词
电场/二元高分子共混体系/相分离/相场模拟/微观组织Key words
electric field/binary polymer blends/phase separation/phase-field simulation/microstructure分类
通用工业技术引用本文复制引用
邢文琪,覃众垚,郭建超,张刚..电场作用下二元高分子共混体系微观组织演化的相场模拟[J].高校化学工程学报,2024,38(6):963-970,8.基金项目
宝鸡文理学院大学生创新创业训练计划资助项目成果(2021XJ115). （2021XJ115）
