Polymerization Kinetics and Thermal/Non-thermal Effects in Microwave-induced Synthesis of Polycarboxylate Superplasticizer
WANG Xiaoyuan1, ZHANG Liran1,2,*, WANG Dongmin1,*, CHEN Yang2, ZHANG Chen2, ZHAI Xinyue2
1 School of Chemical & Environmental Engineering, China University of Mining and Technology, Beijing 100083, China 2 College of Materials Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
Abstract: The application of polycarboxylate superplasticizer (PCE) has greatly promoted the development of modern concrete technology. In order to achieve precise regulation of the molecular structure of PCE and low energy consumption production, the synthesis process itself is also constantly developing and advancing. In this paper, the polymerization kinetics, microwave thermal effect and non-thermal effect were studied and compared with the conventional water bath synthesis process (thermal induction method). The results showed that the reaction time of microwave-induced polymerization was reduced by 88.9%, and the conversion rate was increased by 25.6%. At high concentration and low temperature, the microwave thermal effect of the reactant solution system was obvious, and the molecular structure was optimized (which was beneficial to the formation of molecules with large molecular weight), which had excellent dispersion performance. Therefore, the microwave induction method is a clean and efficient preparation method, which can realize accurate synthesis of products, facilitate continuous industrial applicative production in the future, and greatly improve production efficiency.
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2025, Vol. 39 
