Počet záznamů: 1  

Thermal properties of conducting polypyrrole nanotubes

  1. 1. 0452281 - UMCH-V 2016 RIV PL eng J - Článek v odborném periodiku
    Rudajevová, A. - Varga, M. - Prokeš, J. - Kopecká, J. - Stejskal, Jaroslav
    Thermal properties of conducting polypyrrole nanotubes.
    Acta Physica Polonica. A. Roč. 128, č. 4 (2015), s. 730-736 ISSN 0587-4246.
    [ISPMA 13 - International Symposium on Physics of Materials /13./. Praha, 31.08.2014-04.09.2014]
    Grant CEP: GA ČR(CZ) GA13-00270S
    Institucionální podpora: RVO:61389013
    Klíčová slova: conducting polymer * polyaniline * polypyrrole
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 0.525, rok: 2015

    Thermal properties of polypyrrole nanotubes synthesized by the chemical oxidation of pyrrole with iron(III) chloride in the presence of methyl orange as structure-guiding template, have been investigated. As-prepared polypyrrole salt and corresponding base were compressed into pellets. Thermogravimetric analysis has shown that the heating/cooling of both polymers is connected with water desorption/re-absorption. This process influences all temperature dependences of the thermophysical properties. The specific heat of both polypyrrole forms was the same at 35°C. The thermal diffusivity of polypyrrole base was lower than that of the salt. The dilatational characteristics are strongly influenced by water desorption/re-absorption. Water desorption is connected with the contraction of polypyrrole and its re-absorption with the expansion of polypyrrole. The electrical resistivity was measured, in analogy to thermal experiments, by a four-point van der Pauw method. The electrical resistivity was 0.016 and 10.2 Ωcm at room temperature, for both materials. The electrical resistivity was also influenced by water desorption/re-absorption as well as other thermophysical properties.
    Trvalý link: http://hdl.handle.net/11104/0254836