文献类型：期刊文献

英文题名：Impact of polycarboxylate superplasticizers (PCEs) with novel molecular structures on fluidity, rheological behavior and adsorption properties of cement mortar

作者：Feng, Hui[1];Feng, Zhongjun[2,3];Wang, Weishan[2,3];Deng, Zuiliang[2,3];Zheng, Baicun[1]

机构：[1]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai 200237, Peoples R China;[2]Shanghai Sunrise Polymer Mat Co Ltd, Shanghai 200231, Peoples R China;[3]Shanghai Engn Res Ctr Construct Admixture, Shanghai 200231, Peoples R China

年份：2021

卷号：292

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20211810296174);WOS:【SCI-EXPANDED(收录号:WOS:000660296800006)】；

基金：The authors would like to gratefully acknowledge the financial support (18QB1403200, 17520730200, 15DZ2282500) from Science and Technology Commission of Shanghai Municipality.

语种：英文

外文关键词：Polycarboxylate superplasticizer; Molecular structure; Sulfonic group; Dispersion; Rheological property; Mortar; Adsorption behavior

摘要：Polyether macromonomers have shown diversified structures recently. In this work, a series of polycarboxylate superplasticizers (PCEs) were synthesized via copolymerization using a novel macromonomer, ethylene-glycol monovinyl polyethylene glycol (EPEG). The molecular structures were modified by varying the side chain length, carboxylate density and integrating sulfonic group. The synthesis reaction of PCEs with high reaction conversion ratio was achieved through rapid reaction(20-30 min) at low temperature (5-20celcius). The fluidity of PCEs, the rheological parameters and the compressive strength of mortar were measured. The adsorption behavior and zeta potential of the cement particles were also measured. Results have shown that PCEs with short side chain and high carboxylate density had high adsorption ability, high dispersion capacity in mortar. In addition, PCEs with sulfonic group had increased adsorption amount on the cement surface. These results could allow further progress in the application of EPEG macromonomer. (c) 2021 Elsevier Ltd. All rights reserved.