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Enhanced thermal properties and morphology of ion-exchanged polypyrrole films

Truong, V. -T., Ennis, B. C. and Forsyth, M. 1995, Enhanced thermal properties and morphology of ion-exchanged polypyrrole films, Polymer, vol. 36, no. 10, pp. 1933-1940.

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Title Enhanced thermal properties and morphology of ion-exchanged polypyrrole films
Author(s) Truong, V. -T.
Ennis, B. C.
Forsyth, M.
Journal name Polymer
Volume number 36
Issue number 10
Start page 1933
End page 1940
Publisher Elsevier Ltd.
Place of publication Oxford, England
Publication date 1995-05
ISSN 0032-3861
1873-2291
Keyword(s) polypyrrole films
ion exchange
thermal properties
Summary The thermal stability of electrochemically prepared polypyrrole (PPy) films with p-toluenesulfonate (pTS) or perchlorate (ClO4−) counterion (PPy/pTS and PPy/ClO4−) is improved by simple treatment with aqueous sulfuric acid, sodium sulfate or sodium bisulfate. The degree of stabilization achieved depends on the solution, temperature and duration of treatment. Although the mechanism for improved stability is not yet clear, it is apparent that the level of ion exchange and the original polymer microstructure are important. A model for the conductivity decay as a function of thickness has been proposed. The early stages of ion exchange are not symmetrical, and diffusion is facilitated at the electrode side of the film. Furthermore, X-ray diffraction shows no evidence of morphological change after treatment of PPy/pTS (43 μm), but in PPy/pTS (12 μm) and PPy/ClO4− (41 μm) films an additional peak is indicative of more ordered structure following treatment. The glass transition temperature, Tg, of PPy/pTS and PPy/ClO4− films obtained by modulated differential scanning calorimetry is approximately 155°C.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1995, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030282

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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