POE-g-MA增韧PPO/尼龙6合金的制备和性能

考虑了采用马来酸酐接枝乙烯－1－1辛烯共聚物（POE－g-MA)反应挤出增韧聚苯醚（PPO）／尼龙6合金体系的力学性参能和亚微相态，结果表明，POE与PPO／尼龙6合金的相容性差，增韧效果不佳，POE接枝MA后，通过其分子链上的MA官能团与PPO／尼龙6合金分子链上的氨基反应，获得良好的界面粘结性和相容性，使合金的缺口冲击强度获得大幅度提高，POE－g-MA增韧PPO／尼龙6合金的韧性随MA接枝率的增加而提高，通过与MA的接枝，可显著提高POE与PPO／尼龙6合金的界面粘结性和合金基体中的分散性，并明显减小POE粒子的直径，流变性能研究表明，由于在反应挤出过程中POE－g-MA分子链上的酸酐官能团与尼龙6上的氨基发生化学反应，使POE－g-MA增韧PPO／尼龙6合金的熔体粘度随POE－g-MA的接枝率的增加而显著提高。

PERFORMANCE OF PPO/NYLON 6 ALLOY TOUGHENED WITH MALEIC ANHYDRIDE FUNCTIONALIZED POE

Poly(phenylene oxide) (PPO)/nylon 6 alloy toughened by Poly (ethylene 1-octene) grafted with maleic anhydride (POE-g-MA) was prepared via reactive extruction. Mechanical property, morphology, and rheology of PPO/nylon 6 alloy toughened by Poly were investigated. Toughness study demonstrated that POE-g-MA with a graft ration of over 0.46 mg/g could toughen PPO / nylon 6 alloys effectively. A " brittle-ductile " transformation happened at POE-g-MA content of 15 mg/g with notched lzod impact strength of 630 J/m. Fracture surface and transmission electron microscopy showed the higher the graft ratio of POE-g-MA was, the better POE dispersed in PPO/nylon 6 matrix and the smaller POE particle size was. The compatibilization of POE-g-MA and PPO/nylon 6 alloy was imputed to the chemical reaction between maleic anhydride and amine group. The study results of rheological property showed that the torque and melt viscosity of PPO/nylon 6/POE-g-MA blends increased with the increasing of MA graft ratio of POE-g-MA.