Under the condition of existence of catalyst and toluene as solvent,mono polyethylene glycol maleate was synthesized by direct esterification of maleic anhydride and polyethylene glycol(400).

• 在自制催化剂、溶剂甲苯存在下,由马来酸酐与聚乙二醇单甲醚(400)通过直接酯化法合成马来酸单聚乙二醇单甲醚酯。