Optional Additional Monomer Compounds:
The methods of the present invention include the use of isosorbide as a monomer component in the preparation of polycarbonate. In some embodiments another monomer compound (e.g. a second monomer compound) or compounds are optionally selected for incorporation into the product polycarbonate. Therefore, the polycarbonates of the present invention may be isosorbide homopolymers, copolymers, terpolymers, or polymers containing several other monomer compounds.