文献类型：期刊文献

英文题名：Closed-Loop Recyclable Vinylogous Carbamothioate-Based Covalent Adaptable Networks

作者：Liu, Jie[2];Shi, Yajuan[2];Li, Jin-Jin[1];Luo, Zheng-Hong[2];Zhou, Yin-Ning[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

年份：2023

卷号：56

期号：17

起止页码：6644

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20233814758945);WOS:【SCI-EXPANDED(收录号:WOS:001144694900001)】；

基金：The authors acknowledge the support from the National Natural Science Foundation of China (Nos. 22078195, 22222807) and Shanghai Rising-Star Program (No. 22QA1402800). The authors also appreciate Shen Li from Hainan University for his valuable help on DFT calculations.

语种：英文

外文关键词：Kinetics - Monomers - Reaction kinetics - Recycling

摘要：Synthesis of covalent adaptable networks (CANs) has been considered a promising strategy to address the challenge of recycling thermosets. However, there is still huge room for improvement, such as diversity of polymer networks, closed-loop recycling processes, and individual monomer recovery. Herein, we designed and synthesized a closed-loop recyclable high refractive index CAN based on vinylogous carbamothioate dynamic chemistry. Both static and dynamic properties of the as-fabricated CAN were investigated in detail, showing improved properties compared to its counterpart. Critically, the relationship between the exchange kinetics of the model reaction, apparent exchange kinetics, bond exchange kinetics, and segmental relaxation in CANs was clarified. Moreover, the resulting CANs were closed-loop recycled through acidolysis and remanufactured based on the recovered pure monomers. The remanufactured CANs possess almost the same original performance. This study offers opportunities for the design of sustainable and closed-loop recyclable CANs with sophisticated dynamic properties.