Polycarbonate Polymer Lab Report

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Polycarbonate Polymer Introduction. Polycarbonate is long chains of linear polyesters of an amorphous structure of carbonic acid and dihydric phenols like bisphenol. The polymer molecule is made up by two major components which are The Bisphenol A containing carbon, hydrogen and the phenyl group (aromatic, benzene rings) represented as the six sided structure of hydrocarbon compounds (C6H6). In the middle two methyl groups identified by the label (CH3), serving as wedges. Linking these is the Carbonate group ester (– O– CO– O–) group.

High impact resistance, Tensile strength & Toughness
The phenyl group gets attracted to various molecules in the Bisphenol A which contributes to lack of mobility and flexibility giving polycarbonate its superior mechanical structure. Being one of …show more content…

Amorphous high temperature resins like PC have a randomly ordered molecular structure which does not have a sharp melt point; (a specific melting point) instead amorphous materials soften gradually as the temperature rises. The defining temperature for amorphous polymers is the glass transition temperature, or Tg. Below this temperature, the amorphous chains become immobilized and rigid and behave like glass, (hard & brittle). PC at higher temps above Tg becomes rubbery and leathery within a wide temp range, as it heats up the molecules become more mobile & rubbery up to Tm (melting point) where they become a liquid.
Pc’s methyl side groups, results in a high glass transition temperature of Tg (145°C). The high Tg allows PC to be used at temperatures in excess of 120Oc. The characteristic of high glass transition temperature of PC is caused by the minimal molecular rotation about the bond and can maintain great rigidity at ambient temperature (between Tβ= - 80°C and Tg =

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