Journal
POLYMER
Volume 46, Issue 12, Pages 4322-4329Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2005.03.014
Keywords
experimental isotherms; Flory-Huggins theory; polycarbonate
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This work reports the experimental isotherms describing the concentration of oxygen and nitrogen in poly(bisphenol A carbonate-co-4,4'-(3,3,5-trimethylcyclohexylidene) diphenol carbonate) vs pressure, at 30 ° C. The solubility coefficients are interpreted in terms of the Flory-Huggins theory, obtaining reasonable values for the enthalpic polymer-gas parameter. A new method is outlined to simulate the probabilities of inserting/removing a gas molecule in a host matrix already containing n molecules of gas. The simulated isotherms representing the pressure dependence of the concentration exhibit the same pattern as those experimentally obtained. © 2005 Elsevier Ltd. All rights reserved.
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