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Diffusion of gold and silver in bisphenol trimethylcyclohexanen polycarbonate

โœ Scribed by R. Willecke; F. Faupel

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
126 KB
Volume
35
Category
Article
ISSN
0887-6266

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โœฆ Synopsis

Diffusion coefficients between 5 1 10 014 and 1 1 10 016 cm 2 s 01 have been measured for diffusion of gold and silver in the glassy state of bisphenol trimethylcyclohexanen polycarbonate in the temperature range between T g ร… 507 K and 420 K using the radiotracer technique in combination with ion-beam sputtering for serial sectioning. The Arrhenius plot exhibits a downward curvature, which is interpreted within an extension of the free-volume theory to the glassy state by Vrentas and Duda. The very small metal diffusivities in comparison to values for gas molecules of comparable size suggest substantial interaction energies.

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