Polycarbonate (PC) is a high molecular polymer containing carbonate group in the molecular chain. According to the structure of ester group, it can be divided into fatty group, aromatic group, aliphatic group and aromatic group.The mechanical properties of aliphatic and aliphatic aromatic polycarbonate are low, which limits its application in engineering plastics.

Only aromatic polycarbonate was produced in industrial production.Due to the special structure of polycarbonate, it has become the fastest growing general engineering plastics among the five engineering plastics.