新型聚乙二醇接枝聚羧酸减水剂的制备  

Preparation of a new polyethylene glycol grafting polycarboxylic water-reducing agents

作　　者：唐林生[1] 张国政[1] 李小丽 翟晓欧 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛市建筑工程质量检测中心有限公司,山东青岛266012

出　　处：《混凝土》2010年第2期74-77,共4页Concrete

摘　　要：以甲氧基聚乙二醇衣康酸单酯(IMPEG)为大单体,合成出了一种新型的聚乙二醇接枝聚羧酸减水剂(减水剂I)。试验结果表明:该减水剂的减水效果比以甲氧基聚乙二醇马来酸单酯和甲氧基聚乙二醇丙烯酸酯为大单体合成的好。当减水剂I用量为水泥质量的0.325%时,水泥的净浆流动度为310 mm,砂浆减水率为35%,坍落度为230 mm,90 min后坍落度约损失6.5%,1、3、7、28 d的抗压强度增长比分别为220%、190%、170%、170%。A new polyethylene glycol grafting polycarboxylic water-reducing agents（water-reducing agent I）was prepared using methoxy polyethylene glycol itaconate（IMPEG）as a large monomer.The experimental results revealed that the performance of the water-reducing agent I was better than that of the products from using methoxy polyethylene glycol maleate or methoxy polyethylene glycol acrylate as a large monomer. When the dosage of water-reducing agent I is 0.325% based on the weight of the cement,the fluidity of cement grout is 310 mm,and the water-re- ducing rate for mortar is 35%,and the slump of concrete can reach 230 mm,and the slump loss is 6.5% over a period of 90 min,and the increased rates of the compressive strength of 1,3,7 days and 28 days are 220%,190%,170% and 170%.

关 键 词：甲氧基聚乙二醇衣康酸单酯 聚乙二醇接枝聚羧酸盐 减水剂 制备 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]