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。
Ethyl acrylate（EA） and butyl acrylate（BA） were employed to modify the diglycidyl ether of bisphenol A （DGEBA）-methyltetrahydrophthalic anhydride （MeTHPA） epoxy system via in-situ polymerization. The ＂sea- island＂ structure is observed from the SEM micrographs of the DGEBA - MeTHPA system modified by polyacrylates. By the addition of 10 % （mass fractioa） EA and BA, the tensile strength of the epoxy system reduces by 9.51% and 4.00%, and the modulus reduces by 14.81% and 9.52M, respectively. The glass transition temperature is not obviously influenced by the addition of polyacrylates. By contrast, the impact strength dramatically increases by 26.5% and 31.0%, and the elongation increases by 22.03% and 30.07%, respectively, showing obvious toughening effects.
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