Doped Conducting Polymer Gel and Its Characteristics as Functions of Solvent, Temperature and Electrochemical Doping Potential

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Abstract
Lightly doped poly(3-alkylthiophene) exhibits the characteristics of a polymer gel. The volume of the sample in chloroform shrinks drastically upon introduction of ethanol and also with decreasing temperature. The shrinkage ratio depends strongly on doping potential and therefore on the dopant concentration. The results are interpreted in terms of dopant-induced cross-linking formation between polymer main chains. The spectrum of the doped get also changes in association with the volume instability.