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## Abstract Sorption and dilation properties of polymer‐gas systems involving poly(ethylene‐co‐vinyl acetate) and N~2~, CH~4~, or CO~2~, have been investigated at pressures up to 50 atm at temperatures of 10–40°C. Sorption isotherms for low‐solubility gases (i.e., CH~4~ and N~2~) can be described by Henry's law, and those for high‐solubility gas (i.e., CO~2~) by Flory‐Huggins dissolution equation. Dilation isotherms are similar in contour to the corresponding sorption isotherms. From the obtained sorption and dilation data, partial molar volumes of the gases in the polymer were determined as a function of temperature. Thermal expansivity of dissolved CO~2~ molecules was estimated at ca. 2.4 × 10^−3^°C^−1^ from the temperature dependence of partial molar volume. The expansivity is smaller than that of liquid CO~2~ and larger than those of the polymer and organic liquids. © 1994 John Wiley & Sons, Inc.

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Author

Yoshinori Kamiya; Yasutoshi Naito; Dominique Bourbon

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-6266)

Published

1994

Language

EN

Field

Materials Science (Physical Sciences)