【摘要】 以生产丙烯醛的废液中所含质量百分数为4.5%~7.0%的丙烯酸和甲基烯丙基聚乙二醇醚为聚合单体,在水溶性氧化-还原引发体系中,采用一套独特的聚合工艺制备聚羧酸系减水剂。探讨了单体质量比、引发剂用量、链转移剂用量、反应温度、反应时间对减水剂性能的影响。结果表明,该聚羧酸系减水剂对水泥有良好的分散性,具有减水率高和坍落度损失小等优点,性能达到或优于市售的同类产品。本方法为处理生产丙烯醛的废液找到一条极为有效的途径,既对环境保护和废物资源化利用具有积极的社会效益,又取得了良好的经济效益。更多还原

【Abstract】 The acrylic acid contain 4.5% to 7.0% of the mass fraction in the liquid waste from production of acrolein and methyl allyl polyethylene glycol ethers as monomer can prepare the polycarboxylic superplasticizer in water-soluble oxidation-redox initiator system by a unique set of polymerization process. Discussing the impact of the monomer mass ratio,the amount of initiator,the amount of chain transfer agent,reaction temperature,reaction time on the properties of water reducer. The results show that the superplasticizer has good dispersion for the cement,as well as high water reduction and slump retention,etc. It can achieve or better than the commercially available products similarly. The method finds an extremely effective way for disposing of the liquid waste from production of acrolein,and it has a positive social benefits to both environmental protection and waste utilization,and achieves good economic benefits as well.更多还原