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111. (Chem. Soc. Rev.) Closed-loop recyclable polymers: from monomer and polymer design to the polymerization–depolymerization cycle
作者:Shuaiqi Yang, Shuai Du, Jin Zhu and Songqi Ma*
關鍵字:closed-loop recycle, polymerization, depolymerization
論文來源:期刊
具體來源:Chemcal society reviews
發表時間:2024年

The extensive utilization of plastic, as a symbol of modern technological society, has consumed enormous amounts of finite and non-renewable fossil resources and produced huge amounts of plastic wastes in the land or ocean, and thus recycling and reuse of the plastic wastes have great ecological and economic benefits. Closed-loop recyclable polymers with inherent recyclability can be readily depolymerized into monomers with high selectivity and purity and repolymerized into polymers with the same performance. They are deemed to be the next generation of recyclable polymers and have captured great and increasing attention from academia and industry. Herein, we provide an overview of readily closed-loop recyclable polymers based on monomer and polymer design and no-other-reactant-involved reversible ring-opening and addition polymerization reactions. The state-of-the-art of circular polymers is separately summarized and discussed based on different monomers, including lactones, thiolactones, cyclic carbonates, hindered olefins, cycloolefins, thermally labile olefin comonomers, cyclic disulfides, cyclic (dithio) acetals, lactams, Diels–Alder addition monomers, Michael addition monomers, anhydride–secondary amide monomers, and cyclic anhydride–aldehyde monomers, and polymers with activatable end groups. The polymerization and depolymerization mechanisms are clearly disclosed, and the evolution of the monomer structure, the polymerization and depolymerization conditions, the corresponding polymerization yield, molecular weight, performance of the polymers, monomer recovery, and depolymerization equipment are also systematically summarized and discussed. Furthermore, the challenges and future prospects are also highlighted.

全文鏈接:https://pubs.rsc.org/en/content/articlelanding/2024/cs/d4cs00663a

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