聚羧酸系减水剂中间大分子单体的合成  

Synthesis of Polycarboxylate Water-Reducer Intermediate Macromonomer

作　　者：赵彦生[1] 吴凤龙[1] 马德鹏[1] 吴永新[1] 魏华[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024

出　　处：《化学与生物工程》2010年第1期33-36,共4页Chemistry & Bioengineering

摘　　要：通过聚乙二醇单甲醚-1200(MPEG1200)与甲基丙烯酸直接酯化合成了甲基丙烯酸聚乙二醇单甲醚-1200酯(MAAPEGME1200)。经正交实验优选出最佳合成工艺条件如下:带水剂甲苯用量为反应物总质量的30%,酸醇摩尔比为3.0∶1,阻聚剂吩噻嗪用量为甲基丙烯酸质量的1.5%,催化剂对甲苯磺酸用量为聚乙二醇单甲醚-1200质量的2.5%,反应温度为125℃,反应时间为9 h。此条件下酯化率达96.72%,双键损失率为3.10%。Methacrylic acid polyethylene glycol single methyl ether-1200 ester was synthesized by esterification of polyethylene glycol single methyl ether-1200 and methacrylic acid. The optimum conditions of synthesizing the monomer by orthogonal experiment were obtained as follows： the amount of methylbenzene, thewater-carrying agent, was 30 % according to the mass of total reactant; the molar ratio of methacrylic acid to polyethylene glycol single methyl ether-1200 was 3.0： 1; the amount of phenothiazine, the polymerization inhibitor, was 1.5% according to the mass of methacrylic acid; the amount of p-toluenesulfonic acid, the catalyst, was 2.5 % according to the mass of polyethylene glycol single methyl ether-1200; the reaction temperature was 125℃ and the reaction time was 9 h. Under the optimum synthetic conditions, the percentage of esterification could be up to 96.72% ,the percentage of loss alkene was 3.10%.

关 键 词：聚羧酸系 酯化 正交实验 大单体 

分 类 号：TQ225.241[化学工程—有机化工]