超支化型聚羧酸减水剂的合成  

Synthesis of hyperbranched polycarboxylic superplasticizer

作　　者：寿崇琦[1] 徐小韦[1] 初永杰[1] 徐磊[1] 蒋大庆[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《混凝土》2010年第1期55-57,共3页Concrete

摘　　要：以偶氮二氰基戊酸为引发剂,甲基丙烯磺酸钠、烯丙基聚氧乙烯醚和甲基丙烯酸叔丁酯为单体,合成两端带有羧基的减水剂主链,再通过缩合反应,在两端接枝超支化聚酰胺-胺,最终得到超支化型聚羧酸减水剂。试验表明:引发剂用量为5%,烯丙基聚氧乙烯醚分子量为700,聚酰胺-胺为4.5代时,水泥净浆流动度达到最高315 mm。The main chian of water reducer agent with carboxyl as its end groups has been synthesized by 4,4＇-Azobis （4-cyanovaleric acid） as the initiator, sodium methylallyl sulfonate, allyl polyethenoxy ether and tert-butyl methacrylate as the monomers and finally a type of polycar- boxylic superplasticizer was synthesized through the condensation reaction, which grafted hyperbranched polyamide-amine at both ends of the main chain of water reducer agent.The results showed that when the dosage of initiator contains 5% of the monomer content, the molecule weight of allyl polyethenoxy ether reaches 700, and the generation of polyamide-amine is 4.5,the fluidity of cement paste reaches the highest 315 ram.

关 键 词：超支化 聚羧酸减水剂 表征 流动度 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]