马来酸酐及亚硫酸氢钠改性环氧树脂的研究

摘要/Abstract

摘要： 本文首先用马来酸酐对环氧树脂进行改性,并进一步与亚硫酸氢钠反应制备带磺酸基团的水性环氧树脂。系统地研究了马来酸酐改性环氧树脂的反应温度、催化剂用量、原料浓度及混合溶剂比例对反应的影响。随着温度的升高,催化剂用量和原料浓度的增加,生成交联网状产物的副反应都会明显增强,体系易凝胶; 溶剂甲苯与丙酮的混合比例较低时,反应体系酸值难于准确监测,并且生成交联网状产物的副反应增强不利于反应的顺利进行。在马来酸酐改性环氧树脂进一步与亚硫酸氢钠反应制备具有水分散性的环氧树脂过程中,用元素分析法测定产物结构中的硫元素含量,并分析了乳液的粒径分布,适宜条件下制备的水性环氧树脂分散体系平均粒径为110nm,粒径分布窄,具有良好的分散稳定性。

关键词: 双酚A 环氧树脂, 改性, 马来酸酐, 亚硫酸氢钠

Abstract: Epoxy resin was modified by maleic anhydride, then reacted with sodium hydrogen sulfite to attach sulfonyl group on it. The effects of reaction temperature,catalyst amount,the concentration of raw materials,and the ratio of mixed solvents on the synthesis process were investigated experimentally during the process of epoxy resin modified by maleic anhydride. The side reaction which produces cross-linked molecular will be significantly enhanced with increasing temperature,concentration of catalyst and raw material. When solvent ratio of methylbenzene and acetone is relative low,acid value is hard to monitor and side reaction with cross-lined products is enhanced, which is not conducive to the reaction. In further reaction with sodium hydrogen,structure of product is examined through elemental analysis to monitor,and particle size distribution of the according modified epoxy emulsion is monitored by Size Distribution Modal Analysis. Particle size of self-emulsifier aqueous dispersion system prepared under optimal conditions is about 100nm,which also shows great stability.

Key words: bisphenol a epoxy resin, modification, maleic anhydride, sodium hydrogen sulfite

中图分类号:

TB332

李鹏, 张雪梅, 程斌, 杨小平. 马来酸酐及亚硫酸氢钠改性环氧树脂的研究[J]. 复合材料科学与工程, 2013, 0(2): 17-21.

LI Peng, ZHANG Xue-mei, CHENG Bin, YANG Xiao-ping. MODIFICATION OF EPOXY RESIN WITH MALEIC ANHYDRIDE AND SODIUM HYDROGEN SULFITE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(2): 17-21.

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