Abstract Hydrolysis of water-soluble industrially important mono- and poly(ethylene glycol) methacrylates catalyzed by sulfuric acid and organic monomeric acids (methacrylic and 2-acrylamido-2-methylpropanesulfonic acid) has been studied in aqueous solutions. Chemical stability of the methacrylates in dilute solutions was found to be independent of the length of ethoxylated fragments. Structurization of the studied solutions and the increase in concentration of hydrogen ions in concentrated solutions of the ethoxylated esters were shown to be the reason for the revealed unusual influence of the initial monomer concentration on the hydrolysis rate. The pronounced self-acceleration effect was observed for the methacrylic acid catalyzed reaction with increase in conversion.

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单和聚（乙二醇）甲基丙烯酸酯的酸催化水解的特征

摘要 研究了在水溶液中用硫酸和有机单体酸（甲基丙烯酸和 2-丙烯酰胺基-2-甲基丙磺酸）催化水溶性工业上重要的单和聚（乙二醇）甲基丙烯酸酯的水解。发现稀溶液中甲基丙烯酸酯的化学稳定性与乙氧基化片段的长度无关。研究溶液的结构化和乙氧基化酯浓缩溶液中氢离子浓度的增加被证明是初始单体浓度对水解速率的异常影响的原因。对于甲基丙烯酸催化的反应，随着转化率的增加，观察到明显的自加速效应。