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Gas chromatographic determination of thermodynamic properties of polymer solutions at high pressure

✍ Scribed by Norman F. Brockmeier; Ronald E. Carlson; Robert W. McCoy

Publisher: American Institute of Chemical Engineers
Year: 1973
Tongue: English
Weight: 713 KB
Volume: 19
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690190609

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✦ Synopsis

Abstract

The gas chromatographic (GC) method for thermodynamic measurements of polymer‐solvent systems at finite concentration has been improved to extend its operating range from atmospheric pressure to over 70 atm and over 240°C. This paper describes the design and opertion of the equipment and the mathematical treatment of the GC data, and presents experimental results for n‐hexane and isooctane in high density polyethylene. These results include the solubility isotherms, activity coefficients, and polymer‐solvent interaction parameters. The activity coefficients covering a range from 4 to 70 atm for n‐hexane in the polymer solution were correlated successfully as a function of composition using a two‐parameter segment interaction equation.

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