超低相对分子质量丙烯酸/烯丙基磺酸钠的制备及对陶瓷粉体的分散性能  

Preparation and Performance of Ultra Low Molecular Weight AA /SAS Copolymer Dispersant for Ceramic Powder

作　　者：刘磊[1] 张光华[1] 付小龙[1] 相瑞[1] 何志琴[1] 李元博[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《精细化工》2014年第4期505-510,共6页Fine Chemicals

基　　金：国家自然科学基金(21176148)~~

摘　　要：以丙烯酸(AA)、烯丙基磺酸钠(SAS)为单体,根据自由基共聚反应机理制备了水溶性共聚物陶瓷分散剂AA/SAS。探讨了不同反应条件对共聚物分散性能的影响,通过FTIR、DSC、XRD以及凝胶渗透色谱(GPC)对共聚物进行了表征,并研究了分散剂用量对陶瓷浆料的流变性能以及Zeta电位的影响。得到的最佳合成条件为:AA与SAS的质量比为5∶1,反应温度为80℃,引发剂用量为单体质量的7.3%,链转移剂用量为单体质量的225.5%;当共聚物加入量(折固掺量)为陶瓷粉体质量的0.3%时,其分散效果最好;当共聚物质量浓度为1.2 g/L时,浆料的Zeta电位的绝对值由37.7 mV升高到62.1 mV。与进口产品PC-67相比,共聚物具有更好的分散效果。Through radical copolymerization, the soluble copolymer dispersant AA/SAS for ceramic powder was synthesized from acrylic acid （AA） and sodium allylsulfonate （SAS）. The effect of different reaction conditions on the dispersing property of copolymer has been investigated. The copolymer was analyzed by Fourier transform infrared spectrometer （FTIR）, differential scanning calorimetry （DSC）, X-ray diffraction （XRD） and gel permeation chromatography （GPC）. Meanwhile, the effects of dispersant concentration on the rheological behavior and Zeta potential of the ceramic slurry were also studied. The results show that the optimum conditions of synthesis are as follows：the mass ratio of acrylic acid to sodium allylsulfonate 5：1, the reaction temperature 80 ~C, the dosage of initiator 7.3%, and the amount of chain transfer agent 225.5 %. When its mass fraction was 0. 3 % , its dispersing effect was the best. The Zeta potential absolute value of the slurry increased from 37.7 mV to 62. 1 mV when the mass concentration of the copolymer was 1.2 g/L. In comparison with imported products PC -67, the copolymer could show better dispersity.

关 键 词：超低相对分子质量 丙烯酸 烯丙基磺酸钠 共聚物 分散剂 丙烯酸系列化学品 

分 类 号：TQ174.47[化学工程—陶瓷工业]