聚羧酸系减水剂的常温合成及性能

发布时间：2018-03-24 09:57

  本文选题：聚羧酸减水剂　切入点：芬顿试剂　出处：《化工进展》2015年11期

【摘要】：以异丁烯醇聚氧乙烯醚(HPEG)、丙烯酸(AA)、甲基丙烯磺酸钠(SMAS)为单体,通过芬顿试剂引发反应,在常温下制备了三元聚羧酸型减水剂(PC),探讨了不同反应条件对减水剂分散性能的影响,并通过傅里叶红外(FTIR)和凝胶渗透色谱(GPC)等手段对共聚物进行了表征。得到最佳合成条件为:引发剂滴加时间3h,引发剂过氧化氢/硫酸亚铁质量比1.2∶1,反应温度30℃,酸醚摩尔比4∶1,磺酸盐用量为单体总质量的1.6%,链转移剂用量为总单体质量的1.5%。当减水剂折固掺量为0.3%时,水泥初始净浆流动度为290 mm,1h后提升到302mm。此常温下合成的减水剂具有良好的分散性和保持性,该方法是一种有应用前景的常温合成方法。
[Abstract]:Using isobutenol polyoxyethylene ether (HPEG), acrylic acid (AA) and sodium methallenesulfonate (SMASS) as monomers, a ternary polycarboxylic water reducer, PCO, was prepared by Fenton reagent at room temperature. The effects of different reaction conditions on the dispersion of water reducer were discussed. The copolymers were characterized by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The optimum synthesis conditions were obtained as follows: the reaction temperature was 30 鈩，

本文编号：1657795