丁二酸酐酯化改性聚羧酸长侧链端羟基及减水剂性能  

Longside chain hydroxyl group of polycarboxylate superplasticizer modified with succinic anhydride and superplasticizer performance

作　　者：杜勇 郭丽萍 陈刚 陈常亮 雷家珩 DU Yong;GUO Liping;CHEN Gang;CHEN Changliang;LEl Jiaheng(School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学化学化工与生命科学学院,湖北武汉430070

出　　处：《新型建筑材料》2018年第8期35-37,共3页New Building Materials

摘　　要：将甲基烯丙基聚氧乙烯醚(HPEG)与丁二酸酐(SAE)进行酯化,得到聚醚端羟基被丁二酸酯化的改性聚醚(SAEHPEG)。再以不同比例的SAE-HPEG和HPEG与丙烯酸聚合,得到一系列分子中含SAE-HPEG长支链的新型聚羧酸减水剂(SAEPCE)。采用红外光谱和核磁氢谱对SAE-PCE的分子结构进行了表征,并对改性前后PCE在水泥浆体中的吸附量进行了测试比较,试验结果表明,改性后减水剂SAE-PCE具有良好的分散性和分散保持性。A modified polyether（SAE-HPEG） with polyether terminal hydroxyl groups esterified by butanedioic acid was ob- tained by the estefify of methyl allyl polyoxyethylene ether（HPEG） and succinic anhydride （SAE）. And a series of novel polycar- boxylate superplasticizer （SAE-PCE） with SAE-HPEG long-chain branches were synthesized by the polymerization of different pro- portions of SAE-HPEG and HPEG with acrylic acid. FTIR and 1HNMR were used to characterize the structure of SAE-PCE,and the adsorption capacity of PCE and SAE-PCE in cement paste were also measured and compared. The experimental results show that the modified superplasticizer SAE-PCE has good dispersity and dispersion stability.

关 键 词：聚羧酸减水剂 端羟基酯化改性 水泥 砂浆 流动性 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]