聚羧酸系高效减水剂的合成及性能研究  

Synthesis and Properties of Polycarboxylic Superplasticizer

作　　者：韩明[1] 张福强[1] 陈树栋[1] 余辉[1] 杜启贞[1] 

机构地区：[1]河北工业大学高分子科学与工程研究所,天津300130

出　　处：《化学建材》2008年第3期38-40,共3页Chemical Materials for Construction

摘　　要：采用溶液共聚合法,以AA、MAA、AMPS、DEM和MPEG1200MA等为原料合成了聚羧酸系高效减水剂,并用FTIR光谱表征了它的结构。详细研究了引发剂、磺酸盐、丙烯酸和马来酸二乙酯等因素对净浆流动度的影响;马来酸二乙酯的加入,减小了流动度损失。在折固掺量为0.3%、水灰比为0.29时,水泥净浆流动度可达275mm,120min内坍落度基本不变。Polycarboxylic high range water reducing agent was prepared by means of solution copolymerization with AA, MAA, AMPS, DEM and MPEG1200MA as raw materials and its structure was characterized by FTIR. Influences of initiator, sulphonate, acrylic acid and diethylmaleate on fluidity of cement paste were studied in details Addition of diethyl maleate helped to reduce slump loss. With addition of 0.3% neat copolymer and water-cement ratio of 0.29, fluidity of cement paste could reach as high as 275mm and there would be basically no slump loss within 120 minutes.

关 键 词：聚羧酸 高效减水剂 塌落度损失 净浆流动度 

分 类 号：TU528.042[建筑科学—建筑技术科学]