Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.
Related to polycarbonate: polycarbonate glasses


(organic chemistry)
[OC6H4C(CH3)2C6H4OCO]x A linear polymer of carbonic acid which is a thermoplastic synthetic resin made from bisphenol and phosgene; used in emulsion coatings with glass fiber reinforcement.



a polyester of carbonic acid and dihydroxy compounds of the following general formula:

Polycarbonates may be aliphatic, mixed, or aromatic, depending on the nature of A and A′. Only aromatic polycarbonates have gained practical importance; they are produced commercially by interphase polycondensation, phosgenation of aromatic dihydroxy compounds in a pyridine medium, or transesterification of diaryl carbonates (for example, diphenylcarbonate) by aromatic dihydroxy compounds. The most commonly used dihydroxy compound is 4,4′ -isopropylidenediphenyl, also called dian or bisphenol A. Polycarbonates based on the bisphenol A have the formula

These polycarbonates are thermoplastic linear polymers (molecular weight, 35,000–70,000) that are characterized by very high impact strength (250–500 kilojoules per sq m, or kilograms-force per cm per sq cm [kgf.cm/cm2]), yield strength (strength in flexure, 77–120 meganewtons per sq m [MN/m2], or 770–1,200 kgf/cm2), and very good dielectric properties (dissipation factor, 0.0009 at 50 hertz). Polycarbonates are optically transparent, cold-resistant (stable at temperatures slightly below – 100°C), and self-extinguishing; they dissolve in most organic solvents such as methylene chloride and chloroform, and are resistant to acids, salt solutions, and oxidizing agents.

Polycarbonates are processed by all the standard methods used for thermoplastic resins (for example, injection molding, extrusion, and compression molding). They are used in the preparation of films, fibers, and various products in many sectors of industry, mainly in electric engineering. In 1973, world production of polycarbonates (mainly in the Federal Republic of Germany, the USA, and Japan) was 100,000 tons.


See references under .



A category of plastic materials used to make myriad products, including CDs and DVDs.
References in periodicals archive ?
Alloying polycarbonate with other engineering thermoplastics, such as acrylonitrile butadiene styrene (ABS), has provided one way to increase flow without significantly changing its impact properties.
ISA International Sign Expo 2015 attendees will have the opportunity to see some of Bayer's polycarbonate sheet products at booth #1528.
Heating tests that simulated stove-top sterilization triggered the bottles to release 5 percent of the unbound BPA into a mixture of alcohol and water designed to mimic the baby formula and fatty foods that might be stored in polycarbonate containers.
Makrolon[R] DX-NR polycarbonate sheet provides high optical performance, balancing light diffusion and transmission.
Sidelite: To be the largest application market for polycarbonate glazing by 2021
Michelle Jou, Global Head of Covestros Polycarbonates segment, said, There is a rapidly growing demand for polycarbonate resins and blends, in particular in China.
Ltd have signed a definitive agreement for Trinseo to sell all of its 50% share in their Sumika Styron Polycarbonate joint venture to Sumitomo Chemical for an undisclosed price, the companies said.
Makrolon[R] SL polycarbonate sheet, on the other hand, offers lighter weight, greater durability, higher impact strength and a brighter, cleaner look.
com)-- Lexan Multiwall Polycarbonate sheets, an easy to install glazing that is built to last forever without any damages and which also provides resistance for weather conditions while it still retains the feel of the atmosphere.