马来酸酐与三羟甲基丙烷酯化反应

Esterification of Maleic Anhydride with Trimethylpropane

摘要:

用马来酸酐(MA)与三羟甲基丙烷(TMP)经酯化反应制备系列三羟甲基丙烷马来酸单酯（TMPMs）。重点考察投料比、反应温度、时间、催化剂等对酯化反应的影响。结果表明：90℃下，n(MA)/( TMP)低于2.5：1时，在240min内MA单酯化率可达99%以上；n(TMP)/(MA)=1:3时，需添加占单体总质量0.2%的对甲苯磺酸催化剂，MA酯化率方可达99%以上。采用NMR对产物的结构和组成进行表征和分析，通过酯化率计算其平均双键官能度。

Abstract:

Trimethylolpropane maleates(TMPMs) are prepared by esterification from trimethylolpropane(TMP) and maleic anhydride(MA). The effects of feed ratio, temperature, reaction time and catalyst are studied, the results indicated: esterification rate of MA can reach 100% with n(TMP)/(MA)=1:2 under 90℃ during 120min, esterification rate of MA can reach 100% with n(TMP)/(MA)=1:2.5 under 90℃ during 240min, for n(TMP)/(MA)=1:3, esterification rate of MA reach 90.7% under 90℃ during 240min and will not change any more. Catalyst addition is helpful for increase of esterification rate of MA, which can reach over 99% without diesterification of MA. The structure and composition of TMPMs are characterized and analysed by NNM R, the Average Double Bond Functionality(ADF) of TMPMs are calculated by esterification rate.