An effective two-step synthesis for the di- methacrylation of 2-hydroxylethylammonium chloride ionic liquid was developed in the presence of methacrylic anhydride. The esterification process was performed through the hydroxyl moiety and the side product methacrylic acid was effectively captured through an ion exchange process via sodium bicarbonate to yield a polymerizable di- methacrylate monomer. The esterification and ion exchange processes were monitored via titrations and spectroscopy. This low viscosity (62 cP) di- functional modified ionomer is thermally homo-polymerized and -polymerized with 55 wt% bis-GMA as a nonvolatile reactive diluent yielding impressive glass transition temperature (T) values up to 157 °C and 170 °C for homo- and - polymer respectively as determined via differential scanning calorimetry method.

中文翻译：

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两步酯化和离子交换法合成及表征二甲基丙烯酸酯化可聚合离子液体

在甲基丙烯酸酐存在下，开发了一种有效的两步合成方法，用于 2-羟乙基氯化铵离子液体的二甲基丙烯酸化。酯化过程通过羟基部分进行，副产物甲基丙烯酸通过碳酸氢钠的离子交换过程被有效捕获，产生可聚合的二甲基丙烯酸酯单体。通过滴定和光谱监测酯化和离子交换过程。这种低粘度 (62 cP) 双官能改性离聚物通过热均聚和与 55 wt% 双-GMA 作为非挥发性活性稀释剂的聚合，产生高达 157 °C 和 170 °C 的令人印象深刻的玻璃化转变温度 (T) 值对于均聚物和聚合物，分别通过差示扫描量热法测定。