WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany.
ACS Macro Lett. 2022 Sep 20;11(9):1162-1166. doi: 10.1021/acsmacrolett.2c00445. Epub 2022 Sep 8.
Chemical recycling of polymers is an elegant approach to achieve a circular economy and address the sustainability and end-of-life issues of plastics. Herein, we report the ring-opening polymerization of a bicyclic lactone that is easily accessible from norcamphor. High molecular weight polyesters ( up to 164 kg mol) are obtained using ZnEt as catalyst, while the polymerizability of the monomer is good even at high temperatures. More importantly, the polymers can be completely depolymerized under thermolysis conditions to selectively recover the pristine monomer. Thus, the monomer design strategy of using ring-fused/hybridized lactones enables an innovative monomer-polymer system that shows both high polymerizability and high depolymerizability.
聚合物的化学回收是实现循环经济和解决塑料的可持续性和生命周期问题的一种优雅方法。在此，我们报告了一种双环内酯的开环聚合，该内酯可从降蒈烷轻松获得。使用 ZnEt 作为催化剂，可以得到高分子量聚酯（高达 164 kg mol），而即使在高温下，单体的聚合性也很好。更重要的是，聚合物可以在热解条件下完全解聚，以选择性回收原始单体。因此，使用环稠合/杂化内酯的单体设计策略使具有高聚合性和高可解聚性的创新单体-聚合物体系成为可能。
