微波辅助合成马来酸二甲酯聚羧酸减水剂结构表征及性能研究  

Structure characterization and performance research of dimethyl maleate polycarboxylate superplasticizer prepared with microwave-assisted synthesis method

作　　者：王天依 张力冉 王启宝[1] 王栋民[1] WANG Tianyi;ZHANG Liran;WANG Qibao;WANG Dongmin(School of Chemical and Environmental Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;College of Material Design and Engineering,Beijing Institute of Fashion and Technology,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]北京服装学院材料设计与工程学院,北京100083

出　　处：《新型建筑材料》2021年第10期95-99,共5页New Building Materials

基　　金：国家自然科学基金面上项目(51572293)。

摘　　要：微波合成技术具有快速、高效、安全等特点,采用微波辅助合成法,以反应性良好的马来酸二甲酯部分替代丙烯酸作为减水剂合成的小单体,以丙烯酸、马来酸二甲酯、端烯基烷撑聚氧乙烯聚氧丙烯醚为主要原料合成聚羧酸减水剂MW-PCE;同时,采用常规水浴法合成减水剂CHS-PCE。对比研究MW-PCE、CHS-PCE的红外光谱、收率、表面张力、分散性和流变性。结果表明:掺加MW-PCE和CHS-PCE后,水的表面张力明显降低;MW-PCE的初始和经时分散性均优于CHS-PCE;掺MW-PCE水泥浆体的屈服应力小于掺CHS-PCE的,且均小于空白水泥浆体。Microwave synthesis technology has the characteristics of rapidity,high efficiency and safety.In this study,microwave-assisted synthesis method was used,in which acrylic acid was partially replaced by dimethyl maleate with good reactivity,and polycarboxylate superplasticizer MW-PCE was synthesized with acrylic acid,dimethyl maleate and terminal alkylene polyoxyethylenepolyoxypropylene ether as main raw materials.Meanwhile,superplasticizer CHS-PCE was synthesized by conventional water bath method.The infrared spectrum,yield and surface tension of MW-PCE and CHS-PCE,as well as the fluidity and rheological properties of cement paste were compared.The study found that after adding MW-PCE,the drop of surface tension is very obvious.The initial and temporal dispersion performance of cement paste with MW-PCE is better than that of CHS-PCE.Through the TOC adsorption performance test,the saturated adsorption capacity of MW-PCE on the surface of cement particles is larger than that of CHS-PCE.The yield stress of cement paste with MW-PCE is smaller than that of CHS-PCE,and both smaller than that of the control paste.

关 键 词：马来酸二甲酯 聚羧酸减水剂 微波合成 流动度 流变性能 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]