Abstract
The electrochemical polymerization of pyrrole on an electrode covered with an insulating polymer film produces conducting polymer alloy films of polypyrrole (PPy) and insulating polymer. By using vinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)) as an insulating polymer, very flexible and stretchable conducting films were obtained. The mechanical properties of the alloy films were studied by measuring tensile strength and dynamic modulus of elasticity. The excellent mechanical properties of P(VDF-TrFE) did not change by the incorporation of PPy up to a charge density of 0.5 C cm−2. A further increase of charge density caused a reduction of dynamic moduli of the alloy films. The alloy films with the charge density of 0.5 C cm−2 extended more than 100% and their surface resistance was almost constant up to 50% elongation. The elongation more than 60% resulted in a large increase of surface resistance, because inhomogeneous fracture occurs from the electrode side of the film. A comparison of the mechanical properties between P(VDF-TrFE)-PPy and other alloy films based on poly(vinyl chloride) were also studied.
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Niwa, O., Kakuchi, M. & Tamamura, T. Mechanical Properties of Flexible Polypyrrole-Based Conducting Polymer Alloy Films. Polym J 19, 1293–1301 (1987). https://doi.org/10.1295/polymj.19.1293
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DOI: https://doi.org/10.1295/polymj.19.1293
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