Efficient and Selective Chemical Recycling of CO2-Based Alicyclic Polycarbonates via Catalytic Pyrolysis

被引：61
作者：
Yu, Yan [1 ]
Gao, Bang [1 ]
Liu, Ye [1 ]
Lu, Xiao-Bing [1 ]
机构：
[1] Dalian Univ Technol, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 34期
基金：
中国国家自然科学基金;
关键词：
Carbon Dioxide; Epoxides; Polycarbonates; Recycling; Salen; BASE-INITIATED DEPOLYMERIZATION; CARBON-DIOXIDE; EPOXIDES; COPOLYMERIZATION; POLYMERIZATION; CO2; POLYMERS; MONOMERS;
D O I：
10.1002/anie.202204492
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Chemical recycling of polymers to their constituent monomers is the foremost challenge in building a sustainable circular plastics economy. Here, we report a strategy for highly efficient depolymerization of various CO2-based alicyclic polycarbonates to epoxide monomers in solvent-free conditions by a simple Cr-III-Salen complex mediated catalytic pyrolysis process. The chemical recycling of the widely studied poly(cyclohexene carbonate) exhibits excellent reactivity (TOF up to 3000 h(-1), 0.1 mol % catalyst loading) and high epoxide monomer selectivity (>99 %). Mechanistic investigation reveals that the process proceeds in a sequential fashion via a trans-carbonate intermediate.
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页数：5
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