Variation of a.c. electrical properties of emeraldine base of polyaniline during its drying from suspension in m-cresol
| Autor: | E.S. Matveeva, Irmina Hernández-Fuentes, V. Parkhutik, R. Diaz Calleja |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Materials science Mechanical Engineering Metals and Alloys Analytical chemistry Polymer Electrolyte Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Mechanics of Materials Electrical resistivity and conductivity Polyaniline Polymer chemistry Materials Chemistry Equivalent circuit Suspension (vehicle) Electrical conductor |
| Zdroj: | Synthetic Metals. 79:159-163 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/0379-6779(96)80185-8 |
| Popis: | The variation of electrical properties of the emeraldine base form of polyaniline during its transformation from a suspension in m -cresol to the dry state was studied in situ, employing electrical impedance measurements at 30 °C in a wide range of frequencies (10 −2 –10 5 Hz). The obtained results were fitted using the equivalent electrical circuit with the elements corresponding to different physical processes in the polymer/solution system. The PANI-EB suspension was approximated by a Randles-type equivalent circuit containing an additional element responsible for the a.c. conductivity in the bulk polymer. During the drying of PANI-EB the configuration of the equivalent circuit was consistently changed from the electrochemical one to that corresponding to the dry polymer. The assumption is put forward that a double layer presented at the polymer/electrolyte interface is transformed into surface states in a dry polymer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect