Abstract: Based on the molecular design mechanism of high performance water-reducer，a kind of polycarboxylate-type water-reducer with both polyoxethylene oxide chains and anionic groups was prepared from methacrylic acid，sodium methacryl-sulfute and methoxy-polyethylene glycol monoester acrylate. The results showed that the properties of water-reducer were effected by the density of graft chains and length of side chains，but appropriate side chain，monomers proportion and molecular weight of polymer could improve dispersion and retention of dispersion ability of water-reducer. The products were characterized and analyzed with FTIR. The results showed that the water-reducer with proleptic structure was obtained.

摘要： 根据高性能减水剂分子设计原理，通过甲基丙烯酸、甲基丙烯磺酸钠、甲氧基聚乙二醇丙烯酸酯等单体的自由基溶液聚合制备了分子链中含有聚氧乙烯链和阴离子基团的聚羧酸类减水剂。结果表明，接枝链的密度和侧链的长度影响减水剂的性能，通过选择适宜长度的侧链及调节共聚单体的比例和聚合物分子量可以增大减水剂的分散性和分散保持性。另外还通过红外光谱对产物进行了表征和分析，结果表明已得到预期结构的聚羧酸类减水剂。