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聚丙烯酸酯改性环氧树脂的力学性能

, PP. 9-15

Keywords: 聚丙烯酸乙酯,聚丙烯酸丁酯,环氧树脂,原位聚合,力学性能

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Abstract:

通过丙烯酸乙酯(EA)和丙烯酸丁酯(BA)在环氧树脂中原位聚合,制备了聚丙烯酸酯改性的缩水甘油醚双酚A(DGEBA)-甲基四氢苯酐(MeTHPA)环氧树脂体系。原位聚合形成的聚丙烯酸酯在环氧树脂基体中形成"海-岛"结构。与纯环氧树脂基体相比,当丙烯酸酯质量分数为10%时,经PEA和PBA改性的聚丙烯酸酯/双酚A-MeTHPA体系的拉伸强度分别降低9.51%和4.00%,而拉伸弹性模量分别降低14.81%和9.52%;玻璃化温度变化不大;而冲击强度分别增加了26.5%和31.0%,断裂延伸率分别增加22.03%和30.07%,增韧效果明显。

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