新型缓释型聚羧酸减水剂的合成及性能研究
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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。
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.
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.
引文
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[10]Ma Z Y,Guan Y P,Liu X Q,et al.Synthesis of magnetic chelator for high-capacity immobilized metal affinity adsorption of protein by cerium initiated graft polymerization[J].Langmuir,2005,21:6987-6994.
[2]倪涛,刘昭阳,程文强,等.一种缓释型聚羧酸减水剂的合成与性能表征[J].新型建筑材料,2016(7):7-10.
[3]Sidney Diamond.The patch microstructure in concrete:the effect of superplasticizer[J].Coment and Concrete Research,2006,36:776-779.
[4]李晓东,任萍,李晓燕.常温合成高保塌型聚羧酸减水剂及其性能研究[J].新型建筑材料,2017(1):97-99.
[5]夏亮亮,倪涛,刘昭阳,等.酸醚比对聚羧酸减水剂共聚物组成及性能影响[J].新型建筑材料,2017(1):94-96.
[6]龙小柱,马超,刘婧雯,等.PEGMA-ST-AM型聚羧酸类减水剂的合成及性能研究[J].商品混凝土,2013(10):40-43.
[7]史鹏飞,周华侨,李志坤.缓释型聚羧酸减水剂的合成及性能优化[J].重庆建筑,2015,14(7):58-61.
[8]陈亚萍,徐征宇,陈斐.缓释高保坍型聚羧酸减水剂的制备及其性能研究[J].新型建筑材料,2015(9):8-11.
[9]房福贤,张鑫,杨霞,等.缓释型聚羧酸减水剂的开发与性能研究[J].新型建筑材料,2013(11):31-34.
[10]Ma Z Y,Guan Y P,Liu X Q,et al.Synthesis of magnetic chelator for high-capacity immobilized metal affinity adsorption of protein by cerium initiated graft polymerization[J].Langmuir,2005,21:6987-6994.