A polycarbonate molecule is composed by a Bisphenol A part and a carbonate group Bisphenol A
Contains two aromatic rings, which are responsible for PC’s stiff backbone
The Bisphenol A group also contributes to PC’s inability to crystallize. This amorphous structure gives the polymer its particular transparency
The Characteristic high glass transition temperature (Tg = 145ºC) of PC is caused by the minimal molecular rotation about the bonds