作　　者： ; ;

机构地区： 中南民族大学化学与材料科学学院催化材料科学湖北省重点实验室

出　　处： 《粘接》 2008年第7期1-4,共4页

摘　　要： 利用一步法合成了4种不同分子质量的低黏度液态超支化环氧树脂,并利用该树脂与双酚A型环氧树脂(E-51)杂化复合,研究其固化物的冲击性能。杂化树脂的冲击性能随超支化环氧树脂含量和/或分子质量的增加先增加后下降,具有最大值;当相对分子质量在3 400左右、质量分数为12%左右时,体系的冲击强度达到最大值,与纯E-51相比提高了208.8%。利用FT-IR和分子模拟技术对超支化环氧树脂的性质和结构进行了表征,采用SEM对杂化树脂的断裂表面进行表征,并解释了增韧机理。 This paper reports on the synthesis of four liquid hyperbranched aromatic polyester epoxy resins HTDE by one-pot method and the hybrid composite of HTDE and diglycidyl ether of bisphenol-A （DGEBA）. The effect of content and molecular weight of HTDE on the impact performance of the cured hybrid resin is also discussed in detail. It showed that the content and molecular weight of HTDE have important effect on the performance of the cured, and the impact performance of the HTDE/DGEBA blends has a maximum with the increase of content and molecular weight of HTDE. The impact strength of the cured with 12% by weight of HTDE and HTDE molecular weight of 3400 g/mol is almost 3.1 times of that of DGEBA. FT-IR and molecular simulation technology are used to characterize the structure and properties of HTDE, and SEM is used to characterize the fracture surface of the cured and the toughness improvement mechanism of the HTDE/DGEBA hybrid resin is accounted for.

关 键 词： 超支化环氧树脂 制备 韧性 机理 分子模拟

领　　域： [化学工程]