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Indexed by:期刊论文

Date of Publication:2018-02-13

Journal:MACROMOLECULES

Included Journals:SCIE、EI

Volume:51

Issue:3

Page Number:771-778

ISSN No.:0024-9297

Abstract:The environmental impact of industrially important plastics can be minimized by using renewable feedstocks and preparing biodegradable polymers. A significantly more meaningful strategy is the utilization of alternating copolymerization of epoxides and cyclic anhydrides or lactone or CO2 to provide degradable polyesters or polycarbonates. Herein, we report a versatile and efficient catalyst system based on dinuclear chromium complex bearing biphenol linking bridge for copolymerizing epoxides with cyclic anhydrides or CO2 or dihydrocoumarin (DHC), affording various degradable copolymers with perfectly alternating structure and narrow molecular weight distribution. Most of the polyesters from DHC are typical semicrystalline materials, being beneficial to the potential application of aliphatic polyesters as structural materials. Notably, this dinuclear chromium catalyst system was also discovered to be very efficient in the one-pot terpolymerization of cyclohexene oxide/phthalic anhydride/CO2, cyclohexene oxide/phthalic anhydride/DHC, or cyclohexene oxide/CO2/DHC, providing polyester-b-polycarbonate, polyester-b-polyester, or poly(ester-random-carbonate), respectively. This approach is valuable for the preparation of various novel materials with tailored property and functionality.