On the 9th, the magazine "Angewandte Chemie International Edition" published online the latest research result of the research team of Professor Xie Xiaolin of the School of Chemistry and Chemical Engineering "Oxygen-regulated one-pot synthesis of carbon dioxide-based block copolymers" Huazhong University of Science and Technology was the first One complete unit.

Carbon dioxide-based polycarbonate (PPC), which uses greenhouse gas CO2 as a cheap and renewable raw material, is degraded into CO2 and water under the action of microorganisms. It is an ideal green and sustainable cycle of "from the air to the air". Molecular materials. Due to its excellent water and oxygen barrier properties and biocompatibility, PPC, as an ideal substitute for petroleum-based polymer materials, can be widely used in fields such as agricultural mulch, packaging, and biomedical materials, providing a solution to the problem of plastic "white pollution" Effective Ways. However, compared with traditional petroleum-based polymer materials, PPC still has the problems of poor mechanical and thermal properties and high production costs. Therefore, the high-performance and low-cost processing of PPC has attracted much attention.

The research team synthesized a series of polyacrylate-b-PPC block copolymers by using carboxyl trithioester compounds as bifunctional chain transfer agents for carbon dioxide copolymerization (ROCOP) and reversible addition-fragmentation chain transfer polymerization (RAFT). (Angew. Chem. Int. Ed. 2018, 57, 3593-3597). Through continuous innovation and research, the team realized the intelligent conversion from controllable/living radical polymerization (CRP) to carbon dioxide copolymerization (ROCOP) by using oxygen as the molecular switch, and synthesized polyvinyl acetate-b-PPC block copolymer in one step. . The new block copolymer can be hydrolyzed under certain conditions and has the characteristics of full biodegradation. It is expected to be used as a compatibilizer for the blending and compounding of PPC with starch and cellulose to achieve high performance and low cost processing of PPC. The research work was funded by the National Key Research and Development Program (2016YFB0302400) and the National Natural Science Foundation of China Youth Project (21604027).

Link to this article： PPC is expected to achieve high performance and low cost processing

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