Polikarbonat je poliester u kojem su dihidrični (ili polihidrični) fenoli spojeni preko karbonatnih veza. Polikarbonati su najtvrđi od svih termoplasta. Prozirne su kao prozor, nevjerojatno jake i krute, mogu se autoklavirati i neotrovne su. Imaju temperaturu krhkosti od 135 stupnjeva.
Polycarbonates are plastics widely used in modern industry having good temperature and impact resistance. This plastic is particularly good to work with more conventional definition techniques (injection molding, extrusion into tubes or cylinders and thermoforming). It is also used when optical transparency is needed, having more than 80% transmission up to the 1560-nm range (short wave infrared range). It has moderated chemical resistance properties, being chemically resistant to diluted acids and alcohols. It is poorly resistant against ketones, halogens, and concentrated acids. The major disadvantage associated with polycarbonates is the low glass transition temperature (Tg>40 stupnjeva), ali se još uvijek u velikoj mjeri koristi kao jeftini materijal u mikrofluidnim sustavima i također kao žrtveni sloj.
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