Sigmatropic Rearrangements of Polymer Backbones: Vinyl Polymers from Polyesters in One Step
作者:Rachael A. J. Ditzler、Aleksandr V. Zhukhovitskiy
DOI:10.1021/jacs.1c09657
日期:2021.12.8
Polymer modification is a fundamental scientific challenge, as a means of both upcycling plastics and extracting a stimulus response from them. To date, the overwhelming majority of polymer modifications has focused on the polymer periphery. Herein, we demonstrate nearly quantitative, scission-free modification of polymer backbones, namely, a metamorphosis of polyesters into vinyl polymers resembling
聚合物改性是一项基本的科学挑战,既可以升级塑料又可以从中提取刺激反应。迄今为止,绝大多数聚合物改性都集中在聚合物外围。在这里,我们展示了聚合物主链的几乎定量、无断裂的改性,即聚酯通过爱尔兰-克莱森 sigmatropic 重排变质为类似于商品材料的乙烯基聚合物。玻璃化转变温度(Tg) 和聚酯的热稳定性在转化后发生巨大变化。除了聚合物改性之外,我们的工作还推动了逆合成分析在聚合物合成中的应用;由内酯生产乙烯基聚合物的非传统方法为大量以前无法获得的材料打开了大门。