摘要
本文通过2-丙烯酰胺-2甲基丙基磺酸钠(AMPS)与丙烯酸(AA)、聚乙二醇单丙烯酸酯(PEA)在一定条件下发生聚合反应合成含有羧基(—COOM)、磺酸基(—SO3M)、聚氧乙烯链(—OC2H4—)等侧链的高性能减水剂PC。结果表明,接枝链的密度影响超共聚物性能,通过调节极性基与非极性基比例及聚合物分子量可以增大减水性和分散性保持性能。合成共聚物掺量为0.14%时水泥浆体有较好的流动性及流动性保持性;产品达到了预期的分子结构,与国外同类产品有很大的相似性。
Comb-shaped copolymer of polycarboxylate （PC） containing carboxyl （COOM）, sulfonic groups （-SO3M）, polyethylene glycol （-OC2H4-） was synthesized by monomers of sodium 2-acrylamido-2-methylpropane sulphonate （AMPS）, acrylic acid （AA）, polyethylene glycol monoester acrylate （PEA） under certain conditions. The results showed that properties of PC were effected by density of graft chain, yet adjustment of polarity group to positive polarity group ratio and molecular weight of polymer could improve water reduction and dispersion so as to maintain its performance. At 0.14% addition of the superplasticizer, fluidity and fluidity preservation of cement paste were fine. Molecular structure of the product was similar to that of overseas products of the same kind.
出处
《化学建材》
2006年第2期36-38,共3页
Chemical Materials for Construction
基金
国家"973"项目资助(2001CB610704-3)
关键词
高性能减水剂
酯化
共聚
净浆流动度
high performance water reducer
esterification
polymerization
fluidity of cement paste
