Abstract Phase change materials (PCMs) are smart systems for thermal energy storage. In this study, we prepared long alkyl groups tethered polythioethers in the blink of an eye from diesters of acetylenedicarboxylic acid with fatty alcohols (lauryl alcohol, stearyl alcohol or docosanol) and various dithiols by using a 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) catalyzed alkyne-thiol polymerization which is a straightforward and extremely rapid method. All polymers were obtained in excellent yields (71–99%). All monomers and polymers were characterized by NMR and FTIR spectroscopies and the molecular weights of the polymers were determined by GPC. The weight average molecular weights (Mw) of these polymers were found to change between 13.3 and 167.3 kDa. Phase change properties of these polythioethers were characterized by DSC and the thermal stability of the polymers were determined by TGA. The thermal reliability after 20 successive heating and melting cycles were also determined. According to our results, polymers prepared from docosanol based acetylenedicarboxylate monomer and 1,4-benzenedimethanethiol were found to be superior. The heat of the melting of this polymer was found as 68.76 J/g and decreased to 67.28 J/g after 20 cycles. The Tm and the Tc of this polythioether were found as 56.44 °C and 47.75 °C, respectively.

中文翻译：

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用于热能储存的聚硫醚基相变材料 (PCM) 的极快合成

摘要 相变材料 (PCM) 是用于热能存储的智能系统。在本研究中，我们通过使用 1,5,7-三氮杂双环 [4.4] 从乙炔二羧酸与脂肪醇（月桂醇、硬脂醇或二十二烷醇）和各种二硫醇的二酯中，在眨眼间制备了长烷基系聚硫醚。 0]dec-5-烯（TBD）催化炔-硫醇聚合，这是一种简单且极其快速的方法。所有聚合物都以极好的收率（71-99%）获得。所有单体和聚合物均通过 NMR 和 FTIR 光谱表征，聚合物的分子量通过 GPC 测定。发现这些聚合物的重均分子量 (Mw) 在 13.3 和 167.3 kDa 之间变化。这些聚硫醚的相变特性通过 DSC 表征，聚合物的热稳定性通过 TGA 确定。还确定了 20 次连续加热和熔化循环后的热可靠性。根据我们的结果，发现由基于二十二烷醇的乙炔二羧酸酯单体和 1,4-苯二甲硫醇制备的聚合物是优越的。发现该聚合物的熔化热为 68.76 J/g，并在 20 次循环后降至 67.28 J/g。该聚硫醚的 Tm 和 Tc 分别为 56.44 °C 和 47.75 °C。4-苯二甲硫醇被发现是优越的。发现该聚合物的熔化热为 68.76 J/g，并在 20 次循环后降至 67.28 J/g。该聚硫醚的 Tm 和 Tc 分别为 56.44 °C 和 47.75 °C。4-苯二甲硫醇被发现是优越的。发现该聚合物的熔化热为 68.76 J/g，并在 20 次循环后降至 67.28 J/g。该聚硫醚的 Tm 和 Tc 分别为 56.44 °C 和 47.75 °C。