Abstract
Soluble polyaniline films were prepared by three different methods: (1) film formation by casting from N-methy 1-2-pyrrolidone solution, (2) film formation from the gel state and (3) film formation using isocyanate terminated 1, 2-polybutadiene as a cross-linking agent. In all three methods, polyaniline main chains were cross-linked with some bonds. These methods gave tough films comparable to engineering plastics such as Keplar. All films obtained with different method showed enhancement of conductivity about ten orders of magunitude upon doping and remarkable decrease in its activation energy. Especially these effects were most remarkable in the film formated from the gel state. The conductivity of the film cross-linked with 33 wt% of polybutadiene was as high as the other films.In all films, the temperature dependence of dynamic modulus was very small. The dynamic modulus of the film formated from the gel was less dependent on temperature in the range from -150°C to 350°C.The present results are very significant from the view point of the applicaton of polyaniline.
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