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On free volume of polymers above the glass transition
Author(s) -
Aharoni S. M.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230120
Subject(s) - volume (thermodynamics) , thermodynamics , glass transition , polymer , activation energy , magnitude (astronomy) , diffusion , chemistry , materials science , polymer chemistry , physics , organic chemistry , astronomy
The magnitude of the activation energy for diffusion, E D is shown to be inversely dependent on the fractional free volume of the polymer above T g . From the proportionality of E D above and below T g , the magnitude of E D below T g 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 g it does not correlate with the Simha‐Boyer fractional free volume below T g , contrary to expectations.
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