Thermal Properties of Conducting Polypyrrole Nanotubes

• Authors: A. Rudajevová , M. Varga , J. Prokeš , J. Kopecká , J. Stejskal
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

72.80.Le; 66.70.Hk; 65.40.De; 66.30.Xj

Discipline

• 66.30.Xj: Thermal diffusivity
• 65.40.De: Thermal expansion; thermomechanical effects
• 66.70.Hk: Glasses and polymers
• 72.80.Le: Polymers; organic compounds (including organic semiconductors)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 4
• Pages: 730-736

Dates

published

2015-10

Contributors

author

A. Rudajevová

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, 121 16 Prague 2, Czech Republic

author

M. Varga

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Macromolecular Physics, 180 00 Prague 8, Czech Republic

author

J. Prokeš

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Macromolecular Physics, 180 00 Prague 8, Czech Republic

author

J. Kopecká

• Faculty of Chemical Engineering, Institute of Chemical Technology Prague, 166 28 Prague 6, Czech Republic

author

J. Stejskal

• Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.128.730