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Transport properties of polyvinylpyridinium anion‐exchange membranes
Author(s) -
Wallace Richard A.,
Vijayaraghavan N. V.
Publication year - 1974
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760140915
Subject(s) - pyridinium , polyvinylidene fluoride , membrane , electrolyte , ion exchange , inorganic chemistry , ionic bonding , materials science , ionic conductivity , ion , electrodialysis , diffusion , polymer chemistry , chemistry , organic chemistry , electrode , biochemistry , physics , thermodynamics
Measurements have been made of the electrical conductivity of water‐saturated heterogeneous anion‐exchange pyridinium membranes in their carbonate and hydroxyl ionic forms as a function of temperature. The pyridinium membranes were prepared from quaternized poly‐4‐vinylmethyl‐pyridinium resin electrolyte incorporated in a polyvinylidene fluoride matrix; the ratio of the pyridinium electrolyte to polyvinylidene fluoride was 4 to 1 by weight. The ion‐exchange capacity and water content of these anion‐exchange pyridinium membranes were measured. Corresponding Arrhenius activation energies of ion transport of carbonate and hydroxyl counter‐ions have been calculated. Self‐diffusion coefficients and the equivalent conductances of these pyridinium membranes in their carbonate and hydroxyl counter‐ion forms have also been determined over a wide temperature range and compared to the reported values for present quaternary ammonium anion‐exchange membranes.