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poe-g-ma增韧ppo/尼龙6合金的制备和性能

Keywords: ppo/尼龙6合金,poe-g-ma,反应挤出,增韧

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Abstract:

?考察了采用马来酸酐接枝乙烯-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在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。

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