Material property design of polymer alloy using particle dispersed phase

众所周知，环氧树脂和PMMA是脆性材料。但是，橡胶改性的聚合物合金通过包括橡胶颗粒而被增韧得更高。高韧性的机制在研究中尚不清楚。橡胶改性环氧树脂在较低温度下发生蠕变变形。为了更好地应用橡胶改性聚合物合金，了解其裂纹尖端的损伤、蠕变和蠕变断裂行为是非常重要的。本文对CT试样进行了断裂试验.材料具有弹性、塑性和蠕变特性。实验中观察到了蠕变损伤区和裂纹尖端附近橡胶颗粒的蠕变损伤。根据试验得到的蠕变曲线，建立了考虑蠕变损伤的蠕变近似方程。研究结果可为橡胶改性聚合物合金的设计提供依据。

It is well-known that the epoxy resin and PMMA are brittle materials. But, a rubber modified polymer alloy is toughened higher by including rubber particles. The mechanism of higher toughness has been not known in the studies. And the rubber modified epoxy is deformed by creep at lower temperature. It is important to understand the damage near the crack-tip, the creep and the creep fracture behavior in order to use the rubber modified polymer alloy.In this study, The material behaviors are the rubber modified epoxy and PMMA are evaluated by the finite element method and experiments. The fracture tests of CT specimen and performed in this study. The material behaviors are elastic, plastic and creep one. The creep damage zone and the creep damage of the rubber particle near the crack-tip is observed in the experiments. The creep approximate equation taking account of creep damage is created using the creep curve obtained from the experiment. The result of the linear, nonlinear, creep, and damage can be based in the design of the rubber modified polymer alloy.