Abstract
The sorption kinetics and equilibrium isotherms of water, methylene chloride, n-heptane and methylene chloride/n-heptane mixtures in glassy amorphous poly(aryl-ether-ether-ketone) (PEEK) have been investigated. Ideal Fickian diffusion, anomalous non-ideal Fickian diffusion, "Case II" sorption mechanism, and diffusion con trolled swelling were observed depending on temperature, solvent type, and external sol vent activity. Gas-chromatographic analysis performed on PEEK samples contacted with methylene chloride/n-heptane mixtures indicated that the presence of methylene chloride enhances n-heptane mobility and equilibrium sorbed amount.
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