| 水溶液中共聚合成聚羧酸系高效减水剂及其性能 |
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| 引用本文： | 魏瑞平,周金能,肖国民.水溶液中共聚合成聚羧酸系高效减水剂及其性能[J].东南大学学报(自然科学版),2009,39(6). |
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| 作者姓名： | 魏瑞平 周金能 肖国民 |
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| 作者单位： | 东南大学化学化工学院,南京,211189 |
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| 基金项目： | 江苏省重大科技成果转化基金资助项目，国家高技术研究发展计划(863计划)资助项目，国家自然科学基金资助项目 |
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| 摘 要： | 以活性大单体聚乙二醇单甲醚甲基丙烯酸酯(MPEGMA)、甲基丙烯酸、马来酸酐和烯丙基磺酸钠为原料,在水溶液中共聚合成聚羧酸系混凝土高效减水剂.考察了单体的摩尔配比、引发剂种类和用量以及甲氧基聚乙二醇(MPEG)分子量等合成条件对减水剂性能的影响.结果表明,最佳的减水剂合成条件为:马来酸酐、MPEGMA、甲基丙烯酸和烯丙基磺酸钠摩尔比为3:4:1:2,引发剂过硫酸铵用量为单体总质量的2.0%,MPEG分子量为1 300.在上述条件下制备得到的聚羧酸减水剂具有良好的分散性和保塑性,掺入该减水剂0.3%(质量分数)的水泥净浆流动度可达到290 mm.
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| 关 键 词： | 聚羧酸系减水剂 共聚 合成 |
Synthesis and performance of polycarboxylate based superplasticizer by free radical copolymerization in aqueous solution |
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| Wei Ruiping Zhou Jinneng Xiao Guomin.Synthesis and performance of polycarboxylate based superplasticizer by free radical copolymerization in aqueous solution[J].Journal of Southeast University(Natural Science Edition),2009,39(6). |
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| Authors: | Wei Ruiping Zhou Jinneng Xiao Guomin |
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| Institution: | Wei Ruiping Zhou Jinneng Xiao Guomin(School of Chemistry , Chemical Engineering,Southeast University,Nanjing 211189,China) |
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| Abstract: | Polycarboxylate based superplasticizer was synthesized with active macromonomer methoxy(polyethyleneglycol)methacrylate(MPEGMA),maleic anhydride,methacrylic acid and sodium allylsulfonate by free radical copolymerization in aqueous solution.The influence of molar ratio of monomer,type and dosage of initiator and the molecular weight of methoxy polyethylene glycol(MPEG) on the copolymerization were investigated.The results show that the optimum reaction condition is as follows: the molar ratio of maleic anhy... |
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| Keywords: | polycarboxylate based superplasticizer copolymerization synthesis |
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