超长侧链星形聚羧酸减水剂的合成及应用  

Preparation and application of super long side-chain star-shape polycarboxylate water reducing agent

作　　者：裴继凯[1,2] 郭国龙[1,3] 王自为 任建国[1,2] 刘滇生[1,2] PEI Ji-kai;GUO Guo-long;WANG Zi-wei;REN Jian-guo;LIU Dian-sheng(School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China;Concrete Admixtures Technology Research Center,Shanxi University,Taiyuan 030006,China;Shanxi University Hesheng New Materials Inc.,Taiyuan 030006,China)

机构地区：[1]山西大学化学化工学院,山西太原030006 [2]山西大学混凝土外加剂技术研究中心,山西太原030006 [3]山西山大合盛新材料股份有限公司,山西太原030006

出　　处：《现代化工》2018年第10期166-170,共5页Modern Chemical Industry

摘　　要：用自制双金属氰化络合物(DMC)催化乙氧基化反应合成超长链的异丁烯基聚乙二醇(HPEG5000)大单体。考察了单体摩尔比、引发剂质量分数、滴加反应时间以及助催化剂质量分数对减水剂性能的影响;并对合成的大单体及聚羧酸减水剂进行了红外光谱和凝胶色谱分析。结果表明,所得产物分子结构为超长侧链结构,符合预期。同时对合成的减水剂进行混凝土性能试验,表现出各龄期强度高、减水率高、坍落度保持好等性能特征。Super long chain methallyl polyethylene glycol（HPEG5000） macromonomers are prepared via ethoxylation reaction catalyzed by self-made double metal cyanide complex（DMC）.The effects of the molar ratio between monomers,the content of initiator,the reaction time of drop wise addition and the amount of co-catalyst on the performance of the synthesized water reducing agent are investigated.The synthesized macromonomer and polycarboxylate water reducing agent are analyzed by means of infrared spectroscopy and gel permeation chromatography.Analysis results show that the product has an expected ultra-long side chain structure.Subjected to a concrete performance test,the polycarboxylate synthesized exhibits high intensity at each age,high water reduction rate,and good slump retention performance characteristics.

关 键 词：双金属氰化络合物(DMC) 乙氧基化 异丁烯基聚乙二醇 超长侧链星形聚羧酸减水剂 混凝土强度 

分 类 号：O632.32[理学—高分子化学]