Intermolecular interactions in target organophilic pervaporation through the films of amorphous Teflon AF2400

Organic–organic pervaporation was studied for high free volume material—amorphous Teflon AF2400 (copolymer of 2,2-bis-trifluoromethyle-4,5-difluoro dioxole and tetrafluoroethylene). Individual organic components—acetone (A), chloroform (Ch) and methanol (M) that are capable of forming azeotrope mixtures as well as binary mixtures A–Ch and M–Ch were tested as penetrants. The process was studied at different temperatures (10–50 °C) over a wide range of composition of mixtures (10–90%). Evidence of formation of associates between the components in the mixtures in the liquid phase and during mass transfer through the films were obtained. IR spectra and quantum-chemical calculations supported these conclusions.