聚羧酸系高效减水剂合成工艺优化研究  

Study on the Optimization of Synthesis Technology of Polycarboxylic Superplasticizer

作　　者：刘娟[1] 张兵 

机构地区：[1]江苏城市职业学院建工系,南京210017 [2]南京尚道化工科技有限公司,南京210094

出　　处：《长春工程学院学报（自然科学版）》2013年第2期18-21,63,共5页Journal of Changchun Institute of Technology：Natural Sciences Edition

摘　　要：以自制大单体(PA)、甲基丙烯磺酸钠(MAS)、甲基丙烯酸(MAA)及引发剂过硫酸铵(PSAM)为原料,在水溶液中通过自由基共聚合反应合成出聚羧酸系高效减水剂(简称PC)。对掺PC的水泥净浆流动度进行测定,得出了合成工艺优化条件:摩尔比PA∶MAA∶MAS=1∶5∶1,PSAM为三者单体质量和的7%,反应温度75℃,反应时间3.5h,反应物体积分数20%～30%,反应体系pH值4.5,此条件下的产物分散性能最佳。通过对优化工艺下合成的PC的红外谱图进行分析,表明PC是含有磺酸基、羧基和醚键的理想高效减水剂。By taking self-made big monomer（PA）, methypropylene sulfonic acid sodium（MAS）, methylac- rylic acid（MAA） and initiator ammonium persulfate （PSAM） as materials, we synthesize Polycarboxylic su- perplasticizer（PC）in the water-soluble fluid through radical copolymerization. PC-doped of fluidity of ce- ment paste is to be determined. The obtained synthesis craft optimization condition is as： Molar ratio of PA ： MAA ： MAS is 1 ： 5 ： 1 ,PSAM is 7% of three monomer total quality,the chemical reaction tempera- ture is 75 ℃, the chemical reaction lime is 3.5 hours, the chemistry reactant density is 20%-30%,the chemical reaction system pH value is 4.5. In this condition,dispersion of the product is the best,by analyzing synthetic PC IR spectrum got by technological parametric optimization,the result shows that PC is an ideal superplasticizer containing sulfonic acid,carboxyl and ether.

关 键 词：聚羧酸系高效减水剂 水泥净浆流动度 合成工艺优化 

分 类 号：TU529[建筑科学—建筑技术科学]