保坍型固体聚羧酸减水剂的制备工艺及性能研究
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摘要
选择OXHP-703聚醚为大单体,丙烯酸、甲基丙烯磺酸钠、甲基丙烯酸甲酯、丙烯酸羟乙酯为小单体,巯基丙酸为链转移剂,在过硫酸钾、抗坏血酸、偶氮二异丁腈双引发体系下采用本体聚合法合成了一种高保坍型固体减水剂GTBT-01。探讨了各因素对减水剂分散性及保坍性的影响,确定了最佳合成工艺条件。试验结果表明,减水剂GTBT-01具有适宜的减水率及坍落度保持性,且对不同的水泥适应性良好。
Select OXHP-703 polyether as macromonomer,acrylic acid,sodium methacrylate,methyl methacrylate,hydroxyethyl acrylate as small monomer,mercaptopropionic acid as chain transfer agent,a high slump retaining solid polycarboxylate superplasticizer GTBT-01 was synthesized by bulk polymerization under the dual-initiator system of potassium persulfate,ascorbic acid and azobisisobutyronitrile. The effects of various factors on the dispersion and slump retention of water-reducing agent were investigated to determine the optimal synthetic conditions. The results show that the product GTBT-01 has a suitable water-reducing rate and slump retention,and has good adaptability to different cements.
Select OXHP-703 polyether as macromonomer,acrylic acid,sodium methacrylate,methyl methacrylate,hydroxyethyl acrylate as small monomer,mercaptopropionic acid as chain transfer agent,a high slump retaining solid polycarboxylate superplasticizer GTBT-01 was synthesized by bulk polymerization under the dual-initiator system of potassium persulfate,ascorbic acid and azobisisobutyronitrile. The effects of various factors on the dispersion and slump retention of water-reducing agent were investigated to determine the optimal synthetic conditions. The results show that the product GTBT-01 has a suitable water-reducing rate and slump retention,and has good adaptability to different cements.
引文
[1]刘春燕,王自为,卫晓慧,等.新型聚羧酸接枝保坍剂的合成与性能研究[J].新型建筑材料,2012(2):42-46.
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[3]李强,王小轩,赵明哲.不同结构大单体合成聚羧酸高效减水剂及其性能研究[J].新型建筑材料,2007(10):37-40.
[4]杨国武,梅名虎,刘钧元,等.真空薄层蒸发法制备聚羧酸减水剂[C]//中国建筑学会.第三届全国混凝土外加剂应用技术专业委员会年会(第三届全国聚羧酸减水系高性能减水剂及其应用技术交流会)论文集.北京,2007:129-133.
[5]张甬,马双平.高效减水剂的性能及其发展趋势[J].桂林工学院学报,20(2):225-228.
[6]贺娜,于晓晨,于才渊.喷雾干燥技术的应用[J].干燥技术与设备,2009,7(3):116-119.
[7]周学永,高建保.喷雾干燥粘壁的原因与解决途径[J].应用化工,2007(6):599-602.
[8]易聪华,汤潜潜,黄欣,等.聚羧酸减水剂在水泥颗粒表面的吸附行为[J].化工学报,2012,63(8):2460-2468.
[9]王子明.聚羧酸系高性能减水剂-制备、性能与应用[M].北京:中国建筑工业出版社,2009.
[10]李晓东,任萍,李小燕.常温合成高保坍型聚羧酸减水剂及其性能研究[J].新型建筑材料,2017(1):97-99.
[2]张明,段彬,贾吉堂,等.新型聚羧酸系减水剂的合成研究[J].新型建筑材料,2010(3):84-87.
[3]李强,王小轩,赵明哲.不同结构大单体合成聚羧酸高效减水剂及其性能研究[J].新型建筑材料,2007(10):37-40.
[4]杨国武,梅名虎,刘钧元,等.真空薄层蒸发法制备聚羧酸减水剂[C]//中国建筑学会.第三届全国混凝土外加剂应用技术专业委员会年会(第三届全国聚羧酸减水系高性能减水剂及其应用技术交流会)论文集.北京,2007:129-133.
[5]张甬,马双平.高效减水剂的性能及其发展趋势[J].桂林工学院学报,20(2):225-228.
[6]贺娜,于晓晨,于才渊.喷雾干燥技术的应用[J].干燥技术与设备,2009,7(3):116-119.
[7]周学永,高建保.喷雾干燥粘壁的原因与解决途径[J].应用化工,2007(6):599-602.
[8]易聪华,汤潜潜,黄欣,等.聚羧酸减水剂在水泥颗粒表面的吸附行为[J].化工学报,2012,63(8):2460-2468.
[9]王子明.聚羧酸系高性能减水剂-制备、性能与应用[M].北京:中国建筑工业出版社,2009.
[10]李晓东,任萍,李小燕.常温合成高保坍型聚羧酸减水剂及其性能研究[J].新型建筑材料,2017(1):97-99.