混合酸酯化法制备聚羧酸用大单体  

Mixed acid transesterification method to produce intermediate macromonomer of polycarboxylate

作　　者：郭秋容[1] 方云辉[1] 蒋卓君[1] 柯余良[1] 温庆如[1] 

机构地区：[1]厦门市建筑科学研究院集团股份有限公司福建科之杰新材料有限公司,福建厦门361101

出　　处：《新型建筑材料》2012年第1期49-52,共4页New Building Materials

摘　　要：以聚乙二醇单甲醚和甲基丙烯酸、丙烯酸,在催化剂、阻聚剂存在的情况下,采用熔融酯化法制备聚羧酸类减水剂中间大分子单体。用核磁共振图谱和红外光谱对产物进行了表征。研究了聚乙二醇单甲醚和甲基丙烯酸及丙烯酸的摩尔比、不同催化剂及阻聚剂用量对反应的影响。在最佳合成条件下,可得到酯化率达95%,双键剩余率为97%的大单体。In the presence of catalyst and inhibitor, using melt transesterification method to produce intermediate macromonomer of polycarboxylate water reducing agent based on methoxypolyethylene glycols,methacrylic acid and acrylic acid. Nuclear Magnetic Resonance Spectroscopy （NMR） and Infrared Spectroscopy （IR） were applied to characterize the product. Factors influencing the reaction were studied. The factors contain Molar ratio of polyethylene glycol,methylacrylic acid and acrylic acid, different quantities of catalysts and inhibitors. Under the optimal synthetic condition,esterification rate can reach 95%,residual rate of double bond is 97%.

关 键 词：聚羧酸系减水剂 甲基丙烯酸 熔融酯化法 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]