- 王秀梅，丁 婭，張 霞，楊 勇，徐 文
引用本文摘 要：通過自由基熱聚合的方法合成了相同羧基密度、相同側鏈長度和密度、不同功能型第三單體的一系列PCE （Polycarboxylate, PCE），利用GPC、FT-IR等手段對PCE結構表征，通過分析其對水泥漿體的Zeta電位、分散、吸附等的影響規律，研究了不同功能型第三單體對PCE宏觀性能的影響規律。結果表明，功能型第三單體為丙烯酰胺的PCE吸附量最大，初始凈漿流動度最大，流動性保持能力較丙烯酸-2-羥乙酯（HEA）或者丙烯酸羥丙酯（HPA）要差。功能型第三單體為HEA或者HPA的PCE在水泥表面的吸附量相當，但由于HEA較HPA生成的PCE吸附層厚度更厚，因而第三單體為HEA的PCE初始凈漿流動度較HPA要大。 Abstract: Comb-like polycarboxylate with the same density of carboxylic acid, same side chain length and side chain density, but different third functional monomer was synthesized by the method of radical thermal polymerization. The structure of PCE was characterized by GPC and FT-IR. The influences of third functional monomer on the macroscopic properties, for instance, the Zeta potential, dispersion and adsorption of the fresh cement paste were investigated systematically. The results indicate that the adsorption amount of PCE with AM as the third functional monomer is the maximum, thereby the best workability of cement paste. However, the fluidity retention capacity is poor than HEA or HPA. The adsorption amount of PCE with HEA or HPA as the third functional monomer is almost the same. Furthermore, the adsorbed layer thickness of PCE with HEA is thicker than HPA, thereby the initial fluidity is larger than HPA.