The PC (polycarbonate) is a technical amorphous thermoplastic material with exceptional resilience, heat resistance, transparency, sterilisability, flame retardant capacity and resistance to discolouration. It is a particular type of carbonic acid polyester produced from the condensation reaction of bisphenol with carbonic acid.
Chemical formula PC: C16 H14 O3
CAS Number PC: 25037-45-0
Chemical Name PC (IUPAC): Poly(oxycarbonyloxy-1,4-phenylene(dimethylmethylene)-1,4-phenylene]
Physical and chemical properties:
PC, being an easily workable material through injection moulding and thermoforming, can be used for different applications.
Polycarbonates with a high molecular weight (which imply a limited MFR) possess better mechanical properties, but the workability of such properties proves difficult. For properties of a high resistance, it's advisable to use polycarbonates with limited MFR; on the other hand for an optimal workability, polycarbonates with a high MFR should be used.
The main problems arise from the inferior external hardness and the weak resistance to atmospheric agents and ultraviolet rays, which cause rapid events of photo-sensitive degradation (yellowing). To resolve such problems an external anti-UV treatment is required. Furthermore PC is a hygroscopic material.
PC standard density: 1,20 – 1,22 g/cm3 (ISO 1183)
PC Melting Point Tm: 260-340 °C
PC Glass transition temperature Tg: 147 °C
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