聚醚类减水剂的合成及性能

Journal of Jilin University(Science Edition)(2013)

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Abstract
采用自由基共聚的方法将甲基烯丙基聚氧乙烯醚、2-丙烯酰胺-2-甲基丙磺酸、马来酸酐和丙烯酸4种单体合成一系列聚醚类高效减水剂,并通过红外光谱、核磁共振氢谱和凝胶渗透色谱(GPC)确认产物结构、分子量及其分布,探讨单体配比与合成工艺,考察减水剂的掺量和温度对水泥净浆流动度及减水率的影响,比较该减水剂在不同水泥应用中的适应性.实验结果表明:该聚醚类高效减水剂分散性较高,初始与1 h后净浆流动度分别为310,300 mm,减水率为35%;在3种水泥应用中均表现优异.
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Key words
dispersion,superplasticizer,water-reducing ratio,paste fluidity,cement,synthesis,PEO
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