The electrochemistry of vinyl polymer membranes

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Abstract
The electrochemical properties of polyvinyl acetate, polyvinyl chloride, and a copolymer of vinyl acetate and polyvinyl chloride have been studied. By means of membrane and bi‐ionic potential measurements, it has been shown that films made from these polymers are cation‐selective with a very low ion‐exchange capacity. The variation of membrane potential with external salt solution concentration occurs in a manner which may be predicted by the Meyer, Teorell, Sievers equations for permselective membranes. These have been used to calculate the fixed ion concentration within the polymers. The results suggest a possible mechanism for the passage of ions through mechanically perfect films.