Effect and Mechanism of Reaction Conditions on Molecular Structure and Dispersion of PCEs
ZHAO Xuesong
SUN Zhenping
YANG Haijing
LUO Qiong
MA Yuefei
Abstract：Polycarboxylate superplasticizers(PCEs)were synthesized by free radical copolymerization of vinyl ethylene glycol monovinyl polyethylene glycol ether and acrylic acid in aqueous solution.The effects of reaction temperature,dropping time and chain transfer agent dosage on the molecular structure and dispersion of PCEs were investigated.The results show that the reaction temperature and chain transfer agent dosage have a great influence on the conversion rate of ethylene glycol monovinyl polyethylene glycol ether,the molecular weight and its distribution of PCEs,resulting in the significant differences in the dispersibility and retention of PCEs in cement paste,while the effect of dropping time is relatively small.
Keywords：polycarboxylate superplasticizerethylene ether macromonomerreaction conditionmolecular structuredispersion
Publication Date：2024-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 132-138 )