In the first part of our work, we demonstrate a design concept for the functionalization of styrene oxide (SO) with a sulfonamide protecting group. A (1S,2S)-(+)-[1,2-cyclohexanediamino-N,N′-bis(3,5-di-t-butylsalicylidene)]-chromium(III)chloride ((salen)Cr(III)) catalyst polymerizes the end grouped epoxide via ring-opening-polymerization (ROP) into the respective polyether backbone. Absolute molecular weights of the resulting homopolymers range between 14.2 to 113 kg mol⁻¹ with a polymer stability up to 300 °C and a glass transition temperature (T_g) of around 68–73 °C. The synthesis is completed by showing a possible post-polymerization modification of the functionalized poly(styrene oxide) (PSO). By adding the polymer to a lithium methoxide solution, a new reactive group in the form of a free sulfonate moiety can be generated. This method enables the transition towards a lithium sulfonated PSO that shows a thermal stability up to 300 °C and a T_g in the range of 18–20 °C.

中文翻译：

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磺酰胺官能化聚（氧化苯乙烯）的合成和潜在后聚合策略的说明


在我们工作的第一部分，我们展示了带有磺酰胺保护基团的氧化苯乙烯（SO）功能化的设计概念。 A (1S,2S)-(+)-[1,2-环己烷二氨基-N,N'-双(3,5-二叔丁基水杨基)]-氯化铬(III) ((salen)Cr(III) ）催化剂通过开环聚合（ROP）将端基环氧化物聚合成各自的聚醚主链。所得均聚物的绝对分子量范围为 14.2 至 113 kg mol ⁻¹ ，聚合物稳定性高达 300 °C，玻璃化转变温度 (T _g ) 约为 68–73 °C。通过显示功能化聚（氧化苯乙烯）（PSO）可能的聚合后改性来完成合成。通过将聚合物添加到甲醇锂溶液中，可以产生游离磺酸盐部分形式的新反应基团。该方法能够过渡到磺化锂 PSO，其热稳定性高达 300 °C，T _g 在 18–20 °C 范围内。