CONVERSION OF CYCLIC POLYCARBONATE OLIGOMERS TO LINEAR POLYCARBONATES INITIATED BY PHOSPHINE-DISULFIDE PRODUCT OR PRECURSOR THEREOF

摘要

RD-21161 CONVERSION OF CYCLIC POLYCARBONATE OLIGOMERS TO LINEAR POLYCARBONATES INITIATED BY PHOSPHINE-DISULFIDE PRODUCT OR PRECURSOR THEREOF Cyclic polycarbonate oligomers are polymerized to linear polycarbonates by the action of a salt prepared by the reaction of a triarylphosphine or triaryl phosphite with an organic disulfide, preferably an aryl disulfide. The reactants which form the salt may be incorporated in the cyclic polycarbonate composition, and interreact when the composition is heated to form the active initiating species.