| 聚羧酸系高性能减水剂的构性关系研究 |
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| 引用本文： | 马保国,谭洪波,孙恩杰,潘伟.聚羧酸系高性能减水剂的构性关系研究[J].化学建材,2006,22(2):36-38. |
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| 作者姓名： | 马保国 谭洪波 孙恩杰 潘伟 |
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| 作者单位： | 武汉理工大学 湖北武汉430070 |
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| 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。
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| 关 键 词： | 高性能减水剂 酯化 共聚 净浆流动度 |
Relationship between Structures and Properties of High Performance Polycarboxylic Water Reducer |
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| Ma Bao-guo et al // Wuhan University of Science and Engineering.Relationship between Structures and Properties of High Performance Polycarboxylic Water Reducer[J].Chemical Materials for Construction,2006,22(2):36-38. |
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| Authors: | Ma Bao-guo // Wuhan University of Science and Engineering |
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| Affiliation: | Ma Bao-guo et al // Wuhan University of Science and Engineering |
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| Abstract: | 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 proper-ties 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. |
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| Keywords: | high performance water reducer esterification polymerization fluidity of cement paste |
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