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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2026, Vol. 45 ›› Issue (2): 404-412.DOI: 10.16552/j.cnki.issn1001-1625.2025.0698

• Cement and Concrete • Previous Articles     Next Articles

Process Optimization and Action Mechanism of Dimethyl Maleate Polycarboxylate Superplasticizer Synthesized by Microwave-Assisted Method

WANG Tianyi1(), GU Yue2, SUN Rui3, WANG Dongmin3()   

  1. 1. The Chinese Ceramic Society,Beijing 100831,China
    2. Tianjin Building Materials Academy of Sciences Research,Tianjin 300381,China
    3. School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China
  • Received:2025-07-17 Revised:2025-10-14 Online:2026-02-20 Published:2026-03-09
  • Contact: WANG Dongmin

Abstract:

Polycarboxylate superplasticizer (PCE) was synthesized by microwave-assisted method and conventional water bath method using terminal alkenyl polyoxyethylene polyoxypropylene ether and dimethyl maleate as raw materials. Taking the dispersion performance of PCE as the main evaluation index, the optimal ratio of raw materials and process conditions were determined by single factor experiment. The results show that the microwave-assisted method can greatly shorten the reaction time and show better reaction efficiency. Compared with conventional water bath method, microwave-assisted method can significantly improve the dispersion performance and time retention ability of PCE. The infrared spectrum analysis show that the products obtained by the two synthesis methods have the same molecular structure. The adsorption isotherm fitting results show that the adsorption behavior of PCE synthesized by two methods on the surface of cement particles conforms to the Langmuir monolayer adsorption model, and the PCE synthesized by microwave-assisted method has stronger adsorption capacity. PCE synthesized by microwave-assisted method has a significant effect on delaying the hydration process of cement, and increasing the dosage of PCE can effectively reduce the total hydration heat of cement.

Key words: dimethyl maleate, water-reducing agent, microwave synthesis, dispersion performance, adsorption mechanism, hydration heat

CLC Number: