The use of carbodicarbene for bio-based polyester synthesis <em>via </em>ring-opening copolymerization of cyclic anhydrides and epoxides
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Ring-opening copolymerization (ROCOP) of cyclic anhydrides and epoxides was conducted using carbodicarbene (CDC) composed of N-heterocyclic carbene (NHC) and cyclic (alkyl)(amino) carbene (CAAC). CDC, as a single-component initiator, produced alternating polyesters with various combinations of monomers, including biomass-based monomers. The synthesized polyesters exhibited high conversion, high selectivity, narrow dispersity, a wide range of glass transition temperatures, and high heat resistance. Moreover, the self-switchable terpolymerization of epoxide/anhydride/lactone was successfully investigated via a one-pot synthetic strategy. Diffusion-ordered spectroscopy and thermal gravimetric analysis were used to confirm terpolymer formation.