Abstract
The in-situ mechanical properties of electrochemically prepared polypyrrole films have been measured whilst immersed in various electrolyte solutions and under the influence of applied electrical potential. The mechanical properties were observed to be sensitive to the oxidation state of the polymer, with the reduced form of the polymer showing a lower modulus and higher elongation at break. The electrolyte cation affected the potential at which the ductile-brittle transition occurs.
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