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- Title
Thermal Properties of Conducting Polypyrrole Nanotubes.
- Authors
RUDAJEVOVÁ, A.; VARGA, M.; PROKEŠ, J.; KOPECKÁ, J.; STEJSKAL, J.
- Abstract
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 cm at room temperature, for both materials. The electrical resistivity was also influenced by water desorption/re-absorption as well as other thermophysical properties.
- Subjects
POLYPYRROLE; NANOTUBES; THERMAL properties; THERMOGRAVIMETRY; ELECTRICAL resistivity
- Publication
Acta Physica Polonica: A, 2015, Vol 128, Issue 4, p730
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.128.730