物理化学学报Issue(12)：2241-2248,8.DOI:10.3866/PKU.WHXB201410171
嵌段共聚物相容剂对聚合物共混体系力学性能影响的连续介观模拟
Sequential Mesoscale Approach for Determining the Effects of the Addition of a Block Copolymer Compatibilizer on the Mechanical Properties of Polymer Blends
摘要
Abstract
The compatibilizing effects of the addition of a block copolymer on the mechanical properties of immiscible polymer blends were studied using a combined simulation method;this method used MesoDyn to determine the morphology and a probabilistic lattice spring model (LSM) to determine the mechanical properties. The mechanical properties, including the Young's modulus, tensile strength, and fracture position, were analyzed as a function of the concentration of the additive. The simulation results showed that the polymer blends without any compatibilizer had poor mechanical properties, compared with the original components, primarily because of the lack of stress transfer across the sharp interface. The tensile strength increased dramatical y with the addition of the compatibilizer. The fracture position moved from the interface further into the matrix with increases in the volume fraction of the compatibilizer, leading to the enhancement of the tensile strength. The Young's modulus varied slightly with increases in the concentration of the additive. These studies provide an efficient path for the correlation of the complex morphologies of polymer blends with their mechanical response.关键词
介观动力学/相容剂/弹簧格子模型/拉伸强度/破碎Key words
MesoDyn/Compatibilizer/Lattice spring model/Tensile strength/Fracture分类
化学化工引用本文复制引用
邓声威,韩霞,黄永民,徐首红,刘洪来,林绍梁..嵌段共聚物相容剂对聚合物共混体系力学性能影响的连续介观模拟[J].物理化学学报,2014,(12):2241-2248,8.基金项目
The project was supported by the National Natural Science Foundation of China (91334203,21476071,51103044) and Fundamental Research Funds for the Central Universities, China.国家自然科学基金(91334203,21476071,51103044)和中央高校基本科研业务费资助项目 （91334203,21476071,51103044）
