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黑龙江省科学院石油化学研究院青年学术交流

    2011年 第11届青年学术交流
    固体环氧树脂水分散体的制备和性能研究
    韩琳
    黑龙江省科学院石油化学研究院

    摘 要:用中等分子量的固体双酚A型环氧树脂ER-1和聚醚合成了一种活性非离子型乳化剂M12-E,对乳化剂M12-E的结构以及合成过程进行了分析。用乳化剂M12-E对环氧树脂ER-1进行乳化,探讨了使用相反转法乳化时,乳化剂浓度、乳化温度和溶剂种类对环氧树脂水分散体的粒径和机械稳定性的影响。此外,将环氧树脂水分散体制成中温固化体系,对其干膜固化物进行了吸水率测试和动态热机械分析。结果表明,引入12 wt%的乳化剂M12-E后,固化体系的吸水率由1.38%降至0.97%,玻璃化转变温度由102.5℃降至82.6℃。用一定量的酚醛环氧树脂对环氧树脂水分散体进行改性,其干膜固化物的Tg有明显提高。

    关键词:环氧树脂水分散体;固体环氧树脂;活性乳化剂;相反转

    Study on preparation of solid waterborne epoxy resin dispersion and its properties
    Fu Gang1,2, Han Lin2, Kuang Hong2, Zhang Mi-lin1, Zhang Bin2, Fu Chun-ming2
    (1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
    2. Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin 150040, China)
    Abstract: A reactive nonionic emulsifier M12-E was synthesized from 聚醚, a propylene oxide/ethylene oxide copolymer, and ER-1, a bisphenol A type solid epoxy resin. The addition polymerization process and the structure of the emulsifier M12-E were investigated. Then, the emulsifier M12-E was used to prepare a series of waterborne ER-1 dispersions by phase inversion technique. Several factors influencing the properties of the waterborne epoxy resin dispersions were investigated. Moreover, moderate temperature curing systems were prepared by addition of the curing agents to the waterborne epoxy resin dispersions. The performances of the cured thin-films of the curing systems were surveyed through Dynamic Mechanical Analysis and water absorption tests. The results showed that when the emulsifier contents of the curing system increased from 0% to 12%, the water absorption rates dropt from 1.38% to 0.97%, and the glass transition temperatures decreased from 102.5℃ to 82.6℃, respectively.
    Key words: waterborne epoxy resin dispersion; solid epoxy resin; nonionic emulsifier; phase inversion technique
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