Zhang Qiao, Hu Chenyang, Pang Xuan, Chen Xuesi
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, 130022, Changchun, China.
ChemSusChem. 2024 Jan 22;17(2):e202300907. doi: 10.1002/cssc.202300907. Epub 2023 Nov 3.
The production and degradation of polyesters are two crucial processes in polyester materials' life cycle. In this work, multi-functional organocatalysts based on fluorides for both processes are described. Organofluorides were developed as catalysts for ring-opening polymerization of lactide (lactone). Compared with a series of organohalides, organofluoride performed the best catalytic reactivity because of the hydrogen bond interaction between F and alcohol initiator. The M values of polyester products could be up to 72 kg mol . With organofluoride catalysts, the ring-opening copolymerization between various anhydrides and epoxides could be established. Furthermore, terpolymerization of anhydride, epoxide, and lactide could be constructed by the self-switchable organofluoride catalyst to yield a block polymer with a strictly controlled polymerization sequence. Organofluorides were also efficient catalysts for upcycling polyester plastic wastes via alcoholysis. Mixed polyester materials could also be hierarchically recycled.
聚酯的生产和降解是聚酯材料生命周期中的两个关键过程。在这项工作中，描述了用于这两个过程的基于氟化物的多功能有机催化剂。有机氟化物被开发为丙交酯（内酯）开环聚合的催化剂。与一系列有机卤化物相比，有机氟化物由于F与醇引发剂之间的氢键相互作用而表现出最佳的催化活性。聚酯产物的M值可达72 kg·mol⁻¹。使用有机氟化物催化剂，可以实现各种酸酐和环氧化物之间的开环共聚。此外，通过自切换有机氟化物催化剂可以构建酸酐、环氧化物和丙交酯的三元聚合，以产生具有严格控制聚合序列的嵌段聚合物。有机氟化物也是通过醇解将聚酯塑料废料升级循环利用的有效催化剂。混合聚酯材料也可以进行分级回收。
