polycarbonate

Also known as PC, Polycarbonate, PC, Makrolon

Key facts

Material.limiting_oxygen_index: 25–29%
Material.name: Polycarbonate
Material.image: Lexan.svg
Material.image_size: 300px
Material.caption: Repeating chemical structure unit of polycarbonate made from bisphenol A ---- class=skin-invert|center|300px Transmission spectrum of polycarbonate
Material.density: 1.20–1.22 g/cm3
Material.abbe_number: 34.0
Material.refractive_index: 1.584–1.586
Material.flammability: HB-V2
Material.water_absorption_eq: 0.16–0.35%
Material.water_absorption_24h: 0.1%
Material.youngs_modulus: 2.0–2.4 GPa
Material.tensile_strength: 55–75 MPa
Material.compressive_strength: >80 MPa
Material.elongation: 80–150%
Material.poissons_ratio: 0.37
Material.hardness_rockwell: M70
Material.izod_impact_strength: 600–850 J/m

via Wikipedia infobox

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Encyclopedic overview

25 sections

Contents

Structure
Production
Phosgene route
Transesterification route
Properties and processing
Applications
Electronic components
Construction materials
3D printing
Data storage
Automotive, aircraft, and security components
Niche applications
Medical applications
Mobile phones
History
Potential hazards in food contact applications
Environmental impact
Disposal
Photo-oxidation of polycarbonate
Photo-aging reaction
Thermal degradation
Effect of fungi
See also
References
External links

Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many applications. Polycarbonates do not have a unique resin identification code (RIC) and are identified as "Other", 7 on the RIC list. Products made from polycarbonate can contain the precursor monomer bisphenol A (BPA).

==Structure== thumb|left|Structure of dicarbonate (PhOC(O)OC6H4 )2CMe2 derived from bis(phenol-A) and two equivalents of phenol. This molecule reflects a subunit of a typical polycarbonate derived from bis(phenol-A). Carbonate esters have planar OC(OC)2 cores, which confer rigidity. The unique O=C bond is short (1.173 Å in the depicted example), while the C-O bonds are more ether-like (the bond distances of 1.326 Å for the example depicted). Polycarbonates received their name because they are polymers containing carbonate groups (−O−(C=O)−O−). A balance of useful features, including temperature resistance, impact resistance and optical properties, positions polycarbonates between commodity plastics and engineering plastics.

Excerpted from Wikipedia’s “polycarbonate” article, available under the CC BY-SA 4.0 licence.