POLYCARBONATE-ULTEM BLOCK COPOLYMERS

摘要

The present invention provides novel block copolycarbonates comprising residues from a hydroxy terminated polyetherimide or polyimide, residues from a dihydroxy compound, and residues from an activated carbonate. In a preferred embodiment of the present invention the polyetherimide or polyimide blocks exhibit high M_w while the resulting block copolycarbonate exhibits a single T_g. The novel block copolycarbonates of the present invention are produced under melt polymerization conditions in the presence an activated carbonate source.