SEBS—g—MAH对PPO／PA66相容性影响的研究

研究了SEBS－g-MAH对PPO／PA66相容性的影响。结果表明SEBS－g-MAH是PPO／PA66共混物良好的反应型增容剂。对PPO／PA66＝75／25的共混物，SEBS－g-MAH的加入对合金的拉伸强度、弯曲强度、Izod缺口冲击强度均有提高，但刚性和耐热性略有下降，共混体系中PA66的玻璃化转变温度升高，PPO的玻璃化转变温度下降。用量一般控制在2．5－5．0PHR之间为宜。对于PPO／PA66＝25／75的共混物，SEBS－g-MAH同样也起增容作用，在不太影响力学性能的条件下，明显改善了PPO/PA66合金的冲击强度，但以用量为5PHR为宜。

Study of Effect of SEBS-g-MAH on Compatibility of PPO/PA66

The effect of SEBS-g-MAH on the compatibility of PPO／PA66 was studied．The results showed SEBS-g-MAH was a good reactive compatibilizer for PPO／PA66．When the blending ratio of PPO／PA66 was 75∶25，the use of SEBS-g-MAH increased the tensile strength，bending strength and Izod notched impact strength of the blend system，but the rigidity and heat resistance of the system decreased a little； at the same time the Tg of PA66 in the system increased while that of PPO in the system decreased；the content of SEBS-g-MAH would better to be 2．5～5．0PHR．SEBS-g-MAH could also be used as compatibilizer for PPO／PA66，the blending ratio of which was 25∶75，in this case the mechanical properties of the system decreased little，but the impact strength of the system increased obviously，and the content of SEBS-g-MAH was better to be 5 PHR．