聚羧酸减缩剂减缩活性单体二甘醇单丁醚马来酸酐单酯的合成与表征  

Synthesis and Characterization of an Active Macromer Monobutyl Diethylene Glycol Ester Maleic Anhydride

作　　者：卓玲[1] 陈宝璠[1,2] 

机构地区：[1]黎明职业大学土木建筑工程学院,福建泉州362000 [2]实用化工材料福建省高等学校应用技术工程中心,福建泉州362000

出　　处：《三明学院学报》2014年第4期6-11,共6页Journal of Sanming University

基　　金：泉州市技术研究与开发重点资助项目(2013Z47;2013Z158;2010G7);福建省教育厅科技项目(JA11329;JA12412)

摘　　要：以二甘醇单丁醚(MBDEG)与马来酸酐(MA)为主要原料,采用无催化剂酯化法合成聚羧酸减缩剂减缩活性单体二甘醇单丁醚马来酸酐单酯(MBDEGMA)。通过单因素试验,重点考察减缩活性单体合成中酸醇摩尔比(n(MA)/n(MBDEG))、酯化反应温度及反应时间对酯化反应的影响,并通过FT-IR和1H-NMR对其结构进行表征。结果表明:n(MA)/n(MBDEG)=3.0∶1,酯化反应温度为130℃,酯化反应时间为4.5 h是合成减缩活性单体的最佳酯化条件。以最佳酯化条件合成的大单体为主要原料制备的聚羧酸减缩剂(SRA-PC),具有良好的干缩性能。当掺量(折固掺量)为0.30%时,水泥胶砂干缩率降低了34.57%。The MBDEGMA is synthesized from MBDEG and MA by the esterification without catalyst. Using the single factor examination, this study observes the impacts on the esterification process produced by the molar ratio of reactants（n（MA）/n（MBDEG））, the reaction temperature and reaction time. Its structural characters are represented by FT-IR and1H-NMR.The result indicates： when the ratio n（MA）/n（MBDEG） is 3.0∶1, with the esterfication reaction temperature at 130℃ and 4.5h as reaction time, the esterification is optimized. The SRA-PC using macromonomer, which is made under the optimized conditions, has a well drying shrinkage. And the drying shrinkage ratio of motar decreases by 34.57% with 0.30% add-in of SRA-PC.

关 键 词：聚羧酸减缩剂 活性单体 二甘醇单丁醚马来酸酐单酯 合成 结构表征 

分 类 号：TU528.042[建筑科学—建筑技术科学]