PC resin itself can yellow, need to add yellowing-resistant additives.
PC is a linear carbonate polyester, the molecule carbonate groups alternating with some other groups, these groups can be aromatic, aliphatic, or both. Bisphenol A-based PC is the most important industrial product.
PC is an almost colorless glassy amorphous polymer with good optical properties. pc high molecular weight resin has high toughness, cantilever beam notched impact strength of 600~900J/m, unfilled grades of heat distortion temperature of about 130°C, glass fiber reinforced can increase this value by 10°C.
PC's flexural modulus can be up to 2400MPa or more, the resin can be processed into large rigid products. The creep rate under load is very low at temperatures below 100°C. PC has poor hydrolysis resistance and cannot be used for products that are repeatedly subjected to high pressure steam.
Extended information;
Polycarbonate applications:
Optical Lighting: used in the manufacture of large lampshades, protective glass, optical instruments, such as left and right eyepiece barrels, but also can be widely used for transparent materials on the aircraft.
Electronic appliances: polycarbonate is an excellent E (120 ℃) level insulating material, used in the manufacture of insulated connectors, coil frames, tube holders, insulating bushings, telephone shells and parts, battery shells for mining lamps and so on.
Can also be used to make parts with high dimensional accuracy, such as CD-ROMs, telephones, electronic computers, video recorders, telephone exchanges, signal relays and other communications equipment. Polycarbonate thin touch is also widely used as capacitors, insulated leather bags, audio tapes, color video tapes and so on.
Source of reference; Baidu Encyclopedia-Polycarbonate