1J. Morales, ²G.J. Cruz, ³M.M. Castillo-Ortega, ¹R. Olayo, ¹Depto. de Física, UAM-I, Apdo. Postal 55-534, Iztapalapa, Mexico, D.F. 09340, ²Depto. de Física, ININ, Apdo. Postal 18-1027, Col. Escandon, Mexico, D.F. 11801, ³Depto. de Investigacion en Polimeros y Materiales, UNISON, Rosales y Blvd. Transversal, Hermosillo, Sonora, Mexico.

Polymers that can move charge carriers can be classified in two groups. The first one has ionic carriers while the other group has electronic carriers. Conjugated polymers such as polypyrrole, polyaniline and their derivatives can be classified between these two groups accordingly with the temperature and humidity environmental conditions. This work presents in the influence of the temperature on the electrical conductivity of thin films of polypyrrole doped in situ with iodine and synthesized by plasma. The measurement of conductivity was done at very low relative humidity to increase the effect of the electronic conductivity that has been shown to be predominant at these conditions. We gave particular interest in the estimation of the activation energy for the electronic conductivity using a modified Arrhenius model to represent experimental data.