阳离子接枝对聚羧酸减水剂性能的影响  

Effects of cationic monomer on performance of polycarboxylate superplasticizer

作　　者：张建淮[1,2] 林华锋[1,2] 付长红[1,2] 冯金之[1,2] 

机构地区：[1]苏州混凝土水泥制品研究院有限公司,江苏苏州215004 [2]江苏中凯新材料有限公司,江苏无锡214116

出　　处：《新型建筑材料》2015年第8期70-72,共3页New Building Materials

摘　　要：采用单体异戊烯基聚氧乙烯醚(TPEG)、丙烯酸(AA)、丙烯酰氧乙基三甲基氯化铵(DAC),以过硫酸铵和维生素C为引发剂,以巯基乙酸为链转移剂,在常温下制备了一种阳离子接枝聚羧酸减水剂。结果表明,DAC接枝后,增强了聚羧酸减水剂的分散保持性,并且混凝土各龄期的强度均有提高。A new polycarboxylate superplasticizer grafted cationic monomer was directly polymerized using isoamyl alcohol polyoxyethylene ether （TPEG）, acrylic acid （AA） and acryloxyethyltrimethylammonium chloride （DAC） as monomers,ammonium persul- fate and ascorbic acid as initiator and mercaptoacetic acid as chain transfer agent at room temperature. The results of the test show that the polycarboxylate superplasticizer has excellent slump retention capability and improve the strength of concrete.

关 键 词：阳离子 聚羧酸减水剂 性能 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]