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On free volume of polymers above the glass transition

✍ Scribed by S. M. Aharoni

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
331 KB
Volume
23
Category
Article
ISSN
0021-8995

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✦ Synopsis

The magnitude of the activation energy for diffusion, ED. is shown to be inversely dependent on the fractional free volume of the polymer above Tg. From the proportionality of ED above and below Tg, the magnitude of El, below T, is also inversely dependent on the free volume in that temperature range. While this correlation holds very well for our determinations of fractional free volume above T,, it does not correlate with the Simha-Boyer fractional free volume below Tg, contrary to expectations.

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