新型缓释型聚羧酸减水剂的合成及性能研究

3.安顺市混凝土外加剂工程技术研究中心，贵州 安顺  561100）

 

    摘要：以甲基烯丙基聚氧乙烯醚（TPEG）、丙烯酸羟乙酯（HEA）、丙烯酸（AA）、钙离子螯合单体（GMA-IDA）等为合成主要原料，经自由基聚合制备了新型缓释型聚羧酸减水剂（RPE）。采用红外光谱对合成减水剂的分子结构进行表征，对合成产品进行了水泥净浆经时流动度测试，结果表明，TPEG、HEA、AA和GMA-IDA聚合顺利进行，合成产物为目标产物；当GMA-IDA替代TPEG质量的10%时，RPE的分散性及分散保持性显著提高，表现出缓释性能和较好的保坍性。

    关键词：缓释；聚羧酸减水剂；水泥净浆流动度；钙离子螯合单体

    中图分类号：TU528.042+.2        文献标识码：A        文章编号：1001-702X（2018）09

 

Study on synthesis and performance of a novel slow release polycarboxylic superplasticizer

WANG Yu1，3，LUO Xiuping2，3，CHEN Shengfu1，ZHAO Jun1，CHEN Shengke1

（1.School of Chemistry and Life Science，Guizhou Education University，Guiyang 550018，China；

2.Guizhou Tiejinahengfa New Material Technology Co. Ltd.，Anshun 561100，China；

3.Anshun Engineering Research Centre of Concrete Admixtures，Anshun 561100，China）

   Abstract：In order to improve the performance of polycarboxylic superplasticizer，A new slow-releasing polycarboxylic superplasticizer（RPE） was synthesized by radical copolymerization with polyoxyethylene allyl methyl ether（TPEG），2-hydroxyethyl acrylate（HEA），acrylic acid（AA），calcium ion chelating monomer（GMA-IDA） as the main synthesis raw materials. Molecular structure of RPE was characterized by Fourier transform infrared spectrum（FT-IR）.The cement paste fluidity over time were studied. The results showed that the copolymerization reaction of TPEG，HEA，AA and GMA-IDA was carried out successfully，the product was target product. When the GMA-IDA replace 10% of TPEG weight，the dispersion and slump-retention-ability of RPE will be significantly improved. RPE exhibits a good slow-release function and a greater slump retaining property.

    Key words：slow-released，polycarboxylate superplasticizer，cement paste fluidity，calcium ion chelating monomer