Highly Selective Preparation and Depolymerization of Chemically Recyclable Poly(cyclopentene carbonate) Enabled by Organoboron Catalysts

被引：33
作者：
Yang, Guan-Wen [1 ]
Wang, Yuhui [1 ]
Qi, Huan [1 ]
Zhang, Yao-Yao [1 ]
Zhu, Xiao-Feng [1 ]
Lu, Chenjie [1 ]
Yang, Li [1 ]
Wu, Guang-Peng [1 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, MOE Key Lab Macromol Synth & Functionalizat, Zhe Da Rd 38, Hangzhou 310027, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 46期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Alternating Copolymerization; Carbon Dioxide; Organoboron Catalysts; Polycarbonate; Recyclable Polymer; ALTERNATING COPOLYMERIZATION; ASYMMETRIC COPOLYMERIZATION; POLYCARBONATE SYNTHESIS; CYCLOPENTENE OXIDE; DIOXIDE; CO2; EPOXIDES; (SALEN)CR(III); POLYMERIZATION; DEGRADATION;
D O I：
10.1002/anie.202210243
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Poly(cyclopentene carbonate) (PCPC) produced by copolymerization of CO2 and cyclopentene oxide (CPO) is a promising but challenging chemical recyclable polymer that has high potential in minimizing plastic pollution and maximizing CO2 utilization. Currently, problems remain to be solved, include low reactivity of toxic metal catalysts, inevitable byproducts, and especially the ambiguous mechanism understanding. Herein, we present the first metal-free access to PCPC by using a series of modular dinuclear organoboron catalysts. PCPC was afforded in an unprecedented catalytic efficiency of 1.0 kg of PCPC/g of catalyst; while the depolymerization of PCPC abides by a combination pathway of random chain scission and chain unzipping, returning CPO in near-quantitative yield (>99 %). The preparation and depolymerization of PCPC along with in depth understanding of related mechanisms would be helpful for further development of advanced catalysts and recyclable plastics.
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页数：11
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