威廉姆森醚化法合成聚羧酸系减水剂大分子单体的研究  

Research on synthesizing polycarboxylate superplasticizer macromonomer by Williamson etherification

作　　者：黄健[1] 方晨炜[2] 马保国[2] 田峻源[2] 

机构地区：[1]武汉理工大学绿色建筑材料及制造教育部工程研究中心,湖北武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《混凝土》2013年第12期94-96,99,共4页Concrete

基　　金：国家"十二五"科技支撑项目功能化复合墙体板材应用技术与研究(2011BAJ04B02)

摘　　要：通过聚乙二醇单甲醚(MPEG)与烯丙基氯的威廉姆森醚化反应,制备了一种可用于合成聚羧酸系减水剂的大分子单体烯丙基聚乙二醇单甲醚(APEG)。通过对试验条件的优化,确定了最佳醚化反应温度为90℃,醚化反应时间6 h,反应摩尔比为n(MPEG)∶n(NaOH)∶n(C3H5Cl)=1.7∶1.1∶1.0,在上述反应与反应物配合比下产物纯度能达到91.8%,产率能达到81.4%。通过FTIR红外光谱羟值测量对大分子单体的结构进行了表征,结果显示烯丙基已成功通过威廉姆森醚化法取代MPEG上的氢。大单体合成的减水剂的减水率和经时流动度损失结果表明,合成的大单体具有良好应用生产价值。In this study, polyethylene glycol monomethyl ether（MPEG ） and allyl chloride were used to prepare allyl polyethylene glycol monomethyl ether（APEG） ,which is a macromonomer used for the synthesis ofpolycarboxylate superplasticizer through Williamson etheri- fication reaction.By the experiment optimization, etherification reaction temperature of 90 ~C ,reaction time 6 h were confirmed.The molar ratio of reactance were confirmed as n （ MPEG ）：n （NaOH）：n （ C3H5C1 ）= 1.7：1.1 ： 1.0.Under above optimized reaction conditions and reac- tance ratio, the measured product purity of 91.8% and yield rate of 81.4% were achieved.Infrared spectroscopy and hydroxyl value showed that the allyl group have successfully substituted the hydrogen of MPEG.Water reducing rate and the loss of fluidity of superplasticizer results showed the superplasticizer synthesized with the macromonomer having good productive value.

关 键 词：减水剂 合成条件 聚乙二醇单甲醚 威廉姆森醚化反应 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]