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The diffusion of oxidising dopant gases into polyacetylene films has been studied. The process is complicated because it is influenced by the doping reaction, by swelling of the polymer by the gas and by degradation reactions of the polymer with the counter-ions. Electrochemical measurements of anion and cation diffusion in doped polymer give diffusion coefficients comparable with those for gaseous dopants. Diffusion coefficients for ions in polythiophene are reported. The results are discussed in terms of potential applications of these polymers.
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Foot et al. (1987) studied this question.
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