细观结构参量对共混物银纹化倾向影响的数值模拟

Numerical Simulations on the Relationship between Polymer Blend Microstructure Parameter and Crazing

银纹化、剪切屈服、空穴化是现今被广为接受的橡胶增韧塑料共混体系韧性得以增加的主要原因。进行了分散相颗粒形状较规则的单相连续两相共混物细观结构参量对共混物银纹的产生和发展影响的研究。借助有限元方法系统模拟了共混体系橡胶粒子的分布形式、添加比例、粒子尺寸、两相间界面层性能、粒子形状等细观结构参量的改变对共混物银纹化的影响规律。其规律可以加深对银纹化这一重要的共混物增韧机理的了解,并对改善共混物的细观结构形式,以期设计出有较好增韧效果的高聚物材料有一定指导意义。

Crazing, yielding and interface debonding all play important roles in the toughening process of rubber-toughened polymers. Numerical simulation was used to investigate the crazing tendency and the expansion of polymer blends which had a continuous single phase and a regular particles shape. By using finite element method, the relationships of micro topology, particle volume fraction, particle size, interface property, particle shape and blends crazing tendency and expansion were studied. Better understanding of polymers toughening mechanism were achieved by the study, which will be helpful to develop new exceptionally strong and tough polymer blends.