【作者】 杨建文； 曾兆华； 张一平； 庞来兴； 陈用烈；

【Author】 Jianwen Yang, Zhaohua Zeng, Yiping Zhang, Laixing Pang, Yonglie Chen (Institute of Polymer Science, Zhongshan University, Guangzhou 510275)

【机构】 中山大学高分子研究所；

【摘要】 本文合成了线型甲基酚醛环氧丙烯酸树脂,研究了催化剂等因素对产物结构与粘度的影响,在乙酰丙酮铬与四丁基溴化铵组合催化下,产物的粘度与酸值均较低。考察了8种多元羧酸酐与环氧丙烯酸树脂的反应性,四氢苯酐、六氢苯酐与甲基六氢苯酐具有较好的反应性,且产物粘度较低。对产物进行了粘度、红外光谱、核磁共振等表征,并运用光DSC研究了羧基化环氧丙烯酸树脂的光交联动力学行为。更多还原

【Abstract】 Linear novolac cresol epoxy acrylate was synthesized under catalytic conditions. The influences of catalysts on reaction process and extent of reaction as well as the structure and viscosity of the product were investigated by means of acid value and viscosity determination, FTIR, 13C NMR spectroscopy. The acrylate with low viscosity and high extent of reaction could be acquired by employing chromium(III) acetylacetonate and tetrabutyl ammonium bromide as complex catalyst. In the synthesis of carboxylated epoxy acrylates, eight polybasic carboxylic acid anhydrides were selected to react with the hydroxy group of epoxy acrylate, respectively. The results of acid value and FTIR determination showed that cw-l,2,3,6-tetrahydrophthalic anhydride, crs-hexahydrophthalic and hexahydro-4-methylphthalic anhydride exhibited satisfying reactivity. Furthermore, the carboxylated epoxy acrylates resulting from the three acid anhydrides had substantially lower viscosity. The photopolymerization conversion of epoxy acrylate catalyzed by chromium acetylacetonate was slightly lower than that catalyzed by tetrabutyl ammonium bromide or N,N-dimethylbenzylamine, which was ascribed to the relatively deep color of the former leading to light screening. The maleic anhydride modified epoxy acrylate showed lower photopolymerization conversion than other epoxy acrylates.更多还原