一种聚羧酸减水剂的合成及其减水性能的研究  

Synthesis and water reducing properties of a polycarboxylate superplasticizer

作　　者：史志花 王栋民[2] 甘向晨[1] 金福锦[1] 

机构地区：[1]建筑材料工业技术监督研究中心,北京100024 [2]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《中国建材科技》2018年第5期37-38,44,共3页China Building Materials Science & Technology

摘　　要：本文以聚乙二醇单甲醚甲基丙烯酸酯、甲基丙烯酸、乙二醇为单体,3-巯基丙酸为链转移剂,过硫酸铵为引发剂合成了一种具有长支链的超支化型聚羧酸减水剂。合成过程中调节了单体摩尔比,和引发剂的含量,并对合成的减水剂进行了水泥净浆流动度测试,发现合成的减水剂比普通的聚羧酸减水剂具有更好的减水性能,并且在单体比为1.6:1,引发剂含量为1.75%时减水效果最好。A hyperbranched polycarboxylic superplasticizer with long branched chain was synthesized by using polyethylene glycol monomethyl ether methacrylate, methacrylic acid and ethylene glycol as monomers, 3-mercaptopropionic acid as chain transfer agent and ammonium persulfate as initiator. The monomer molar ratio and initiator content were adjusted in the synthesis process. The fluidity of cement paste was tested. It was found that the synthesized water reducing agent had better water reducing performance than the common polycarboxylic acid water reducing agent, and the water reducing effect was the best when the monomer ratio was 1.6：1 and the initiator content was 1.75%.

关 键 词：减水剂 聚羧酸 净浆流动度 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]