This paper reports the synthesis and characterization of disulfide polymers obtained by oxidation of 2-[2-(2-sulfanylethoxy)ethoxy]ethanethiol (DODT) using a benign, synergistic system comprised of air, dilute hydrogen peroxide and triethylamine as a catalyst that can be recycled. The dn/dc value of the polymer in THF was determined to obtain absolute molecular weight measurements. High molecular weight disulfide polymers (up to M_n = 250000 g/mol) with polydispersity indices as low as M_w/M_n = 1.15 were obtained. Thermal analysis by DSC and TGA demonstrated that the rubbery polymers had a T_g of −50 °C and began to degrade at 250 °C. Dithiothreitol reduced the polymers back to the original monomeric units in 33 h. MALDI-ToF showed the involvement of oligodisulfide rings (2–14 mers) in the polymerization that displayed the characteristics of a living/controlled polymerization; poly(DODT) was readily chain extended with 1,2-ethanedithiol. The chain extension indicates a class of living polymerization which is governed by radical recombination.

中文翻译：

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绿色高分子化学：经由环中间体的活性二硫醇聚合

本文报道了由良性，协同作用的系统（由空气，稀的过氧化氢和三乙胺组成的催化剂）氧化2- [2-（2-硫代甲氧基）乙氧基]乙硫醇（DODT）而得到的二硫化物聚合物的合成和表征。被回收。确定聚合物在THF中的d n / d c值以获得绝对分子量测量值。获得了多分散指数低至M _w / M _n = 1.15的高分子量二硫化物聚合物（高达M _n = 250000 g / mol）。DSC和TGA的热分析表明，橡胶状聚合物的T _g为温度为−50°C，并在250°C时开始降解。二硫苏糖醇可在33小时内将聚合物还原为原始单体单元。MALDI-ToF表明低聚二硫环（2-14个单体）参与了聚合反应，显示了活性/受控聚合反应的特征。聚（DODT）容易与1,2-乙二硫醇扩链。扩链表示一类活性聚合，其受自由基重组支配。