Measurements of Henry's Constants for Hydrocarbon Vapors in Polystyrene and Poly(Phenylene Sulfide)Powders by Gas Chromatography

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Henry’s constants have been obtained for ethylbenzene in polystyrene in the region from 373.2 to 523.2 K, and for ten nonpolar hydrocarbon vapors in molten poly(phenylene sulfide) in the region of 563.2 to 593.2 K under atmospheric pressure by using a gas chromatography method. Columns were packed with physical mixtures of GC support and polymer powders. As the particle size increased, the flow rate effect was diminished and experimental results coincided with those obtained by the coating method. For the case of poly(phenylene sulfide) with an average particle size of 30 μm, values of specific retention volume for all substances were independent of the flow rate at the temperatures above the polymer melting point and good results could be obtained. Experimental Henry’s constants of nonpolar hydrocarbons in molten poly(phenylene sulfide) could be correlated with a relationship for molten polyethylene and polyisobutylene.
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