非离子单体改性聚羧酸盐水泥减水剂的制备及应用  

Effect of Nonionic Monomers on Properties of Polycarbox-ylate Water Reducing Agent

作　　者：赵艳娜[1] 底一 林磊 黄涛 Zhao Yanna;Di Yi;Lin Lei;Huang Tao(College of Chemistry and Chemical Engineering,Shaanxi University of Science & Technology,Xi'an710021,China)

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《山东化工》2019年第7期23-26,共4页Shandong Chemical Industry

基　　金：大学生创新创业训练计划项目(201710708016)

摘　　要：采用甲氧基聚乙二醇丙烯酸酯(MPEG)为主要原料,与丙烯酸(AA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)进行聚合,以过硫酸铵和双氧水共同作为引发剂,在以异丙醇和水为溶剂,3-巯基丙酸为链转移剂的条件下采用自由基聚合的方式聚合制备聚羧酸系高效减水剂。研究了大单体的分子链长短和磺酸盐的用量对合成聚羧酸盐减水剂分散性能的影响,并对聚羧酸盐高效减水剂进行表征,在高强混凝土中的应用进行了测试,在掺量为0.17%(质量分数)时,水泥初始净浆流动度达到270 mm。By using methoxypolyethylene glycolacrylate(MPEGA),acrylicacid(AA),2-acrylamide-2-methylpropanesulfonic acid(AMPS)as the main raw material,The monomer was polymerized at a certain molar ratio and polymerized with ammonium persulfate and hydrogen peroxide as initiator in the presence of isopropanol and water as solvent,3-mercaptopropionic acid as chain transfer agent in a free radical polymerization manner to produce a carboxylic acid superplasticizer.In this paper,the different proportions of the monomers,the molecular chain length of the macromonomer and the amount of the sulfonate the were discussed.

关 键 词：甲氧基聚乙二醇丙烯酸酯 聚羧酸盐减水剂 混凝土 

分 类 号：TQ172.4[化学工程—水泥工业]