and the phosgene method is the mainstream preparation process

polycarbonate (pc), also known as pc plastic, is a polymer containing carbonate groups in the molecular chain. it has high light transmittance, impact resistance, heat resistance, aging resistance, and strong electrical insulation. features. with the gradual advancement of production technology, the types of polycarbonates are becoming increasingly abundant. according to the different ester group structures, they can be roughly divided into aromatic, aliphatic, aliphatic-aromatic, etc. among…