Polymide copolymers containing polycarbonate soft segments

摘要

A new copolymer composition comprises the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polycarbonate or a mixture of an oligomeric aliphatic polycarbonate and an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture.