“…Poly (propylene carbonate) (PPC) is an ecofriendly biodegradable polymer synthesized from carbon dioxide (CO 2 ) and propylene oxide (PO) [1,2]. In consideration of largely available "greenhouse" gas CO 2 can be utilized as a cheap carbon resource for PPC production, this copolymer has gained a continuous interest worldwide in the elds of academia and industry [3][4][5]. As a thermoplastic aliphatic polycarbonate, PPC has the properties of desirable biodegradability, good biocompatibility, excellent oxygen barrier performance and su cient toughness at ambient temperature, which has potential applications in packaging, adhesives, biomedical material, etc [6][7][8].…”