High Quality Content by WIKIPEDIA articles! Polycarbonates are a particular group of thermoplastic polymers. They are easily worked, moulded, and thermoformed; as such, these plastics are very widely used in the modern chemical industry. Their interesting features (temperature resistance, impact resistance and optical properties) position them between commodity plastics and engineering plastics. Polycarbonates do not have a unique plastic identification code and are identified as Other, 7.