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Equilibrium water sorption properties of amorphous poly(ethylene furanoate) (PEF) and amorphous poly(ethylene terephthalate) (PET) were studied at 35 °C over the entire water activity range. PEF exhibits a largely increased equilibrium water sorption capacity of ∼1.8× averaged over the entire concentration range compared to PET, resulting from substitution of the non-polar phenyl ring in PET with...
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...
Incorporation of selected low molecular weight diluents (LMWDs) into poly(ethylene terephthalate) (PET) significantly improves oxygen and carbon dioxide barrier properties. A so-called Barrier Improvement Factor (BIF), defined as the ratio of permeability of pure polymer to that of antiplasticized polymer, provides a useful indication of improved barrier properties. The average BIF was found to be...
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