High-precision gravimetric technique for determining the solubility and diffusivity of gases in polymers

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DOIResolve DOI: http://doi.org/10.1002/(SICI)1099-0488
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TypeArticle
Journal titleJournal of Polymer Science Part B: Polymer Physics
Volume36
Issue12
Pages20252032; # of pages: 8
SubjectPolymer; Gas; Solubility; Diffusivity
AbstractAn in situ gravimetric technique, employing an electrobalance, is described for determining the solubility and diffusivity of gases in polymers over extended ranges of temperature and pressure. Solubilities of CO₂ in polystyrene at 35°C were measured as a test case; the results are in excellent agreement with the literature values determined by the pressure decay method. Solubility and diffusivity results are also reported for PVC-CO₂ at 35°C and for PS-1,1,1,2-tetrafluoroethane at 30, 90, and 120°C. A comparison with other studies shows the in situ method to be more efficient and precise than the ones based on weighing the gas-saturated polymer under ambient conditions. The kinetics of gas sorption were analyzed in terms of two data reduction techniques to derive diffusion coefficients.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedYes
NRC number41965
NPARC number14299098
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Record identifiercb735f19-fdb6-4298-8e1b-cc0e63ba6e24
Record created2010-03-01
Record modified2017-03-23
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