Iwuoha, Emmanuel I.Alemu, HailemichaelNarayan, Himanshu2016-12-082016-12-082006-10-24http://dx.doi.org/10.1002/pssa.200622304http://repository.tml.nul.ls/handle/20.500.14155/1147Polyaniline (PANI) and polyaniline/fly ash (PANI/FA) composites with various concentrations of fly ash (20%, 40% and 50%) were synthesized by the process of in-situ polymerization. The samples were characterized by powder X-ray diffraction, thermogravimetric analysis, infrared spectroscopy, and scanning electron microscopy. Moreover, the dc conductivity of the samples was measured as a function of temperature in the range 80–290 K and it was found that the addition of FA decreases the conductivity. The temperature dependence of the dc conductivity for PANI and FA/PANI composites has been explained on the basis of the quasi one-dimensional variable hopping model. A very good agreement was found between the experimental data and the theory.en© 2006 WILEY-VCH Verlag GmbH & Co.Article