Measurement of thermal properties of polyaniline salt from room temperature 30 to 140ºC

385-389The thermal transport properties of polyaniline (doped with HCl) have been measured using transient plane source (TPS) technique. Cl- doping is confirmed by FTIR spectroscopy. In the temperature range from room temperature 30 to 140ºC both effective thermal conductivity (λe) and effective thermal diffusivity (ke) increase with increase in temperature from 30 to 60ºC and become almost constant in the temperature range 60 - 100ºC. For further increase in temperature, the values of λe and ke decrease. This behaviour of thermal transport properties in the above mentioned ranges of temperature is due to decrease in moisture content and conversion of single-phase crystalline structure into multiphase crystalline structures, respectively. It has also been found that the values of thermal transport properties are much higher for salt as compared to its base form. This is suggestive of the fact that a change of -NH- group of base form into –[[N⁺H] Cl⁻]- group in salt form takes place by doping of chloride ions