端羧基型超支化聚羧酸减水剂的合成工艺及性能研究  

Study on the hyperbranched carboxyl terminated polycarboxylate superplasticizer synthetic process and performance

作　　者：智艳飞[1] 宋涛文[1] 吴峰[1] 汪伟[1] 王栋民[1] 王启宝[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《商品混凝土》2011年第12期24-28,共5页Ready-Mixed Concrete

基　　金：国家自然科学基金(批准号:50872151)资助项目

摘　　要：本研究从分子结构设计的角度出发,选用马来酸酐、邻苯二甲酸酐和二异丙醇胺合成了一种具有端羧基型超支化功能单体参与聚羧酸高性能减水剂的主链结构的合成,通过正交设计试验研究制备了一系列具有端羧基型超支化聚羧酸减水剂。试验结果分析表明该减水剂具有更优的分散性能,正交分析得到最优组合:MAA与超支化单体F的摩尔比为2,链转移剂用量为1.1%,引发剂用量为2.8%,反应时间为6小时,反应温度为90℃。From the perspective of molecular design,we composed a kind of hyperbranched monomer to participate in?the main chain of polycarboxylate superplasticizer with maleic anhydridea,phthalic anhydride and diisopropanolamine.Synthesized a series of new type PC designed by the method of orthogonal experimental.The results showed that the superplasticizer has better cement dispersing performance.Orthogonal experimental results showed the optimal combination-the molar ratio of MAA and monomer F is 2,the dosage of chain transfer agent is 1.1%,the dosage of initiator is 2.8%,the reaction time is 6 hours,the reaction temperature is 90℃.

关 键 词：端羧基 超支化 聚羧酸减水剂 流动度 正交试验设计 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]