聚羧酸高效减水剂的低温合成技术及性能研究  

Synthesis and Dispersing Properties of Polycarboxylic Superplasticizer in the Low Temperature

作　　者：李晓燕[1] 李晓东[1] 唐盟[1] 周大稳 刑俊涛 胡红伟[1] 

机构地区：[1]河南城建学院,平顶山467036 [2]河南省洛阳市君江建材有限公司,洛阳471003

出　　处：《硅酸盐通报》2014年第8期2109-2113,共5页Bulletin of the Chinese Ceramic Society

基　　金：2013年河南城建学院科学研究重点项目(2013JZD001)

摘　　要：低温条件下,以异戊烯醇聚氧乙烯醚(TPEG)、甲基丙烯磺酸钠(SAMS)、丙烯酸(AA)、复合引发剂E为原料,利用自由基共聚反应合成聚羧酸高效减水剂。探讨了AA与SAMS、TPEG的摩尔比、加料方式、引发剂用量、反应温度和反应时间对合成减水剂性能的影响。实验结果表明,利用最佳生产工艺参数所制减水剂,当掺量为水泥用量的0.18%时,减水率可达29%,初始净浆流动度达280 mm,1 h经时流动度为270 mm,具有良好的分散性和保坍性。The polycarboxylate superplasticizer was synthesized with Isoamyl alcohol polyoxyethylene ether, Sodium Methylallyl Sulfonate, acrylicand composite initiator Eby aqueous solution polymerization. The effects of molar ratio reaction , concentration, feeding mode, dosage of initiator, copolymerization temperature and reaction time of AA to TPEG and SAMS on the performance of polycarboxylate superplasticizer were investigated. The results show that the polycarboxylate superplasticizer prepared under optimal process parameters has good dispersibility and slump retention. When the content is 0. 18% of the amount of cement, the water reducing rate can reach 29%, the initial fluidity can reach 280 mm and remain 270 mm after 1 h.

关 键 词：聚羧酸类减水剂 异戊烯醇聚氧乙烯醚 低温 水泥净浆流动度 

分 类 号：TB321[一般工业技术—材料科学与工程]