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从亚微相态和冲击性能出发 ,对比了采用熔融挤出法制备的PPO/SEBS和PPO/SEBS g MAH两种共混物 .结果表明 ,在本文所研究的弹性体用量范围内 ,PPO/SEBS为“海 岛”型结构 ,而PPO/SEBS g MAH呈现网状结构 ;PPO/SEBS体系无脆韧转变现象 ,PPO/SEBS g MAH体系则在弹性体用量为 10 %～ 15 %时出现明显的脆韧转变 ,缺口冲击强度达到 95 0J/m ,这种超韧现象源于其网状结构的形成 .文中进一步用DSC和毛细管流变仪对共混体系的热性能和流变性能进行了测试 ,探讨了PPO/SEBS g MAH共混物网状结构的形成原因
The blends PPO / SEBS and PPO / SEBS g MAH prepared by the melt extrusion method were compared from the submicron phase and impact properties.The results showed that within the range of elastomer used in this study, PPO / SEBS “island” type structure, while PPO / SEBS g MAH showed a network structure; PPO / SEBS system without brittle-to-ductile transition phenomenon, PPO / SEBS g MAH system at the elastomer dosage of 10% to 15% Brittle-tough transition, notched impact strength of 95 0J / m, the super-tough phenomenon originated from the formation of its network structure.This paper further with DSC and capillary rheometer on the thermal and rheological properties of the blends were tested The reasons for the formation of PPO / SEBS g MAH network were discussed