Abstract
Poly(vinyl- p-benzoquinone) and its copolymer with styrene were synthesized and their electrochemical behavior determined. The cyclic voltammetry of the polymer solution exhibited some irreversibility, but this was eliminated by separating the neighboring groups in the copolymer structure. In like manner, electrodes coated with homopolymer exhibited asymmetric scans, whereas copolymer coatings, in which there is a greater spatial separation between electroactive groups, produced symmetrical voltammograms. For polymer films on Pt electrodes, a decrease in peak current on successive scans and a subsequent full recovery to the original peak height was noted. The role of chemical and physical changes in the films during the cycles of oxidation and reduction are considered in the rationalization of these phenomena. A pronounced effect of solvent type on the properties of the film is attributed to variation in permeability arising from changes in chain configuration.
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