Bulk solvent-free ring-opening copolymerization of CHO and MA catalyzed by series of Cr(III) asymmetrical bis-Schiff-base complexes

Abstract

Using each of the Cr(III) asymmetrical bis-Schiff-base complexes with different substituents as the catalyst, bulk solvent-free copolymerization of CHO (cyclohexene oxide) and MA (maleic anhydride) is efficiently realized, where besides high catalytic activity and polymeric chain-growth owe to the introduction of substituent ortho and/or para to the phenoxide group, low catalyst concentration is helpful for the formation of perfectly alternating polyester.