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Divergent methods for polyester and polycarbonate depolymerization with a cobalt catalyst
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DOI：10.1039/d3qi01833d.png)
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Abstract
En 中文
A pyridine diimine cobalt catalyst series is used for the cyclodepolymerization (CDP) of several different polyesters and polycarbonates. In the presence of isopropanol, a wide range of polymers can undergo solvolytic depolymerization. CDP of poly(propylene carbonate) revealed an unzip back-biting or random scission mechanism, depending on what conditions were used. The first example of a method capable of solvolysis and CDP on a polymer mixture in the same pot is identified. Catalytic methods for the cyclodepolymerization and solvolysis of polyesters and polycarbonates have been realized with a molecular cobalt catalyst. Nascent strategies to modify these methods for use in mixed plastic waste streams are identified.
Keywords:
CARBON-DIOXIDE
POLY(PROPYLENE CARBONATE)
HYDROGENATION
IRON
POLYMERIZATION
DEGRADATION
EPOXIDES
LACTIDE
SYSTEM
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