Herein we describe the alcoholysis of super engineering plastics under mild conditions. Treatment of polysulfone (PSU) with methanol mediated by sodium hydroxide in 1,3-dimethyl-2-imidazolidinone (DMI) at 80 °C resulted in facile depolymerization to form bis(4-methoxyphenyl)sulfone and 4,4’-(propane-2,2-diyl)diphenol (bisphenol A) in high yields. These products were readily isolated by simple filtration. The DMI solvent effectively promoted depolymerization and allowed insoluble resins such as polyetheretherketone (PEEK) to undergo the reaction. This method was applicable to other alcohols, such as ethanol and isopropyl alcohol.

中文翻译：

---

易得碱介导的氧化亚苯基超级工程塑料的醇解

在此，我们描述了超级工程塑料在温和条件下的醇解。在 1,3-二甲基-2-咪唑啉酮 (DMI) 中，在 80 °C 下用氢氧化钠介导的甲醇处理聚砜 (PSU)，容易解聚形成双(4-甲氧基苯基)砜和 4,4'-(丙烷) -2,2-二基）联苯酚（双酚 A）收率高。这些产物很容易通过简单过滤分离。DMI溶剂有效地促进解聚并使不溶性树脂如聚醚醚酮（PEEK）发生反应。该方法适用于其他醇类，如乙醇、异丙醇。