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This study investigates the penetrant transport properties of water, oxygen, and carbon dioxide at 35 °C in poly(ethylene 2,5-furanoate) (PEF) isothermally crystallized at 115 and 160 °C. Dual-mode analysis of the water sorption isotherms for the semicrystalline vs. amorphous PEF samples indicates that the Henry’s law sorption parameter (kD) is reduced for the semicrystalline samples in direct proportion...
This study investigates the phenomenon of caffeine antiplasticization of amorphous poly(ethylene terephthalate) (PET). Oxygen and carbon dioxide permeation measurements at 35 °C reveal significant barrier improvement (e.g., >3× for PET mixed with ∼10.7 wt% caffeine) for all PET/caffeine samples studied. Penetrant solubility and diffusivity estimates are used to deconvolute the relative transport...
Oxygen transport in amorphous poly(ethylene furanoate) (PEF) was studied at various temperatures using complementary permeation and pressure-decay sorption techniques. A significant reduction in oxygen permeability of ∼11× was observed at 35 °C for PEF compared to poly(ethylene terephthalate) (PET), and is attributed primarily to reduction in chain segment mobility for PEF resulting from a hindrance...
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