Decay of electrical conductivity in p-toluene sulfonate doped polypyrrole films

Kaynak, Akif 2009, Decay of electrical conductivity in p-toluene sulfonate doped polypyrrole films, Fibers and polymers, vol. 10, no. 5, pp. 590-593.

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Title Decay of electrical conductivity in p-toluene sulfonate doped polypyrrole films
Formatted title Decay of electrical conductivity in p-toluene sulfonate doped polypyrrole films
Author(s) Kaynak, Akif
Journal name Fibers and polymers
Volume number 10
Issue number 5
Start page 590
End page 593
Total pages 4
Publisher The Korean Fiber Society/Springer
Place of publication Amsterdam, The Netherlands
Publication date 2009-10
ISSN 1229-9197
1875-0052
Keyword(s) polymer
thin film
electrochemical technique
electrical conductivity
Summary Long term performance of conductivity of p-toluene sulfonic acid (pTSA) doped electrochemically synthesized polypyrrole (PPy) films was estimated from accelerated aging studies between 80 °C and 120 °C. Conductivity decay experiments indicated that overall aging behavior of PPy films deviated from first order kinetics at prolonged aging times at elevated temperatures. However, an approximate value for the activation energy of the conductivity decay of PPy was calculated as E=47.4 kJ/mol, enabling an estimate of a rate constant of k=8.35×10−6/min at 20 °C. The rate of decrease of conductivity was not only temperature dependent but also influenced by the dopant concentration. A concentration of 0.005 M pTSA in the electrolyte resulted in a conductive film and when this film was exposed to 120 °C for a period of 40 h, the conductivity decayed to about 1/20 of its original value. The concentration of pTSA was increased to 0.05 mol/l and when the resulting film was aged in the same way, it showed a decrease in the conductivity to about 1/3 of its original value. Both microwave transmission and dc conductivity data revealed that highly doped films were considerably more electrically stable than lightly doped films. The dopant had a preserving effect on the electrical properties of PPy.
Notes The original publication can be found at www.springerlink.com
Language eng
Field of Research 091209 Polymers and Plastics
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2009
Copyright notice ©2009, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30020845

Document type: Journal Article
Collection: School of Engineering
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