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緩釋單體對羧基保護型聚羧酸減水劑性能的影響

作者:戴民,季宏妍

關鍵字:緩釋,單體,對,羧基,保護型,聚,羧酸,減,水劑,

 
(沈陽建筑大學 材料科學與工程學院,遼寧 沈陽  110168)
    摘要:分別以丙烯酰胺、丙烯酸羥丙酯、丙烯酸羥乙酯作為主要緩釋組分合成不同體系的羧基保護型聚羧酸減水劑,采用紅外光譜分析了不飽和單體的水解,并分析了不飽和單體對羧基保護型聚羧酸減水劑分散性的影響。結果表明:丙烯酰胺取代率為40%的TPEG2700-AM-AA體系、丙烯酸羥丙酯取代率為60%的TPEG2700-HPA-AA體系、丙烯酸羥乙酯取代率為80%的HPEG2500-HEA-AA體系所合成的羧基保護型聚羧酸減水劑的2 h經時分散性最佳。
    關鍵詞:緩釋單體;羧基保護型聚羧酸減水劑;合成;紅外光譜分析;分散性
    中圖分類號:TU528.042+.2        文獻標識碼:A        文章編號:1001-702X(2020)11-0069-05
 
Effect of slow release monomers on the properties of polycarboxylate water reducer
DAI Min,JI Hongyan
(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
    Abstract:In this paper,different systems of polycarboxylic acid water reducer were prepared with acrylamide,hydroxypropyl acrylate and hydroxyethyl acrylate as the main slow-release components. The hydrolysis of unsaturated monomers was analyzed by infrared spectrum,and the effect of unsaturated monomers on the performance of polycarboxylic acid water reducer was analyzed. The results show that the carboxyl protected polycarboxylic acid water reducing agent prepared by TPEG2700-AM-AA system with 40% of acrylamide substitution rate,TPEG2700-HPA-AA system with 60% of hydroxypropyl acrylate substitution rate,HPEG2500-HEA-AA system with 80% of hydroxyethyl acrylate substitution rate has the best fluidity over time of 2 h.
    Key words:sustained release monomer,carboxyl protected polycarboxylic acid water reducer,infrared spectrum analysis,fluidity
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