摘要
采用丙烯酸为单体,过硫酸铵作引发剂,亚硫酸氢钠作链转移剂,制备分子量范围为3 000～5 000的聚丙烯酸铵.研究引发剂质量分数、反应温度和单体质量分数等对聚合物分子量的影响.探索合成低分子量聚丙烯酸铵的最佳工艺参数：引发剂质量分数0.5%（占单体）,单体质量分数为35%（占体系）,聚合温度60℃,聚合时间为3～4 h;并把合成的低分子量聚丙烯酸铵用作氯氧镁水泥的减水剂,结果表明,分子量为4 200的聚丙烯酸铵的用量为0.8%时,达到了最佳减水效果.
In this paper,Poly-acrylic acid ammonium of the molecular weight range from 3 000 to 5 000 was synthesized of Poly-acrylic acid ammonium was on the condition of acrylic acid as monomer, ammonia persulfate as initiator and sodium sulfite as chain transfer agent. The effects of amount of initiator, monomer and reaction temperature on the molecular weight were studied. It got the optimal technological parameters：35% monomer, 0.5% initiator, temperature 60℃,polymerization time 3～4 h. Meanwhile, the low molecular weight polyacrylic acid ammonium was used as the superplasticizer of magnesium oxychloride cement. The result was shown that polyaerylic acid ammonium whose molecular weight was 4 200 achieved the optimal water reducing effect when the amount of polyacrylic acid ammonium was 0.8%.
出处
《沈阳化工学院学报》
2008年第3期234-237,共4页
Journal of Shenyang Institute of Chemical Technolgy
关键词
聚丙烯酸铵
低分子量
减水剂
氯氧镁水泥
poly-acrylic acid ammonium
low-molecular weight
the water reducing agent magnesium oxychloride cement
