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|Title:||Electrical and thermal stability of chemically synthesized conductive polypyrrole-halogen complexes|
|Authors:||Neoh, K.G. |
|Source:||Neoh, K.G.,Kang, E.T.,Tan, T.C. (1988). Electrical and thermal stability of chemically synthesized conductive polypyrrole-halogen complexes. Polymer Degradation and Stability 21 (2) : 93-103. ScholarBank@NUS Repository.|
|Abstract:||Conductive polypyrrole(PPY)-halogen complexes were obtained via the simultaneous chemical polymerization and oxidation of pyrrole by bromine (Br2), iodine (I2) or chlorine (Cl2). The thermal stability of these complexes was studied by thermogravimetry while the electrical stability was characterized by electrical conductivity measurements at various temperatures and current loadings, as well as by cyclic voltammetry. Although the PPY-I2 complex shows the best thermal-physical stability, the PPY-Br2 complex has the most favourable electrical properties. The room temperature electrical conductivity of the PPY-Br2 complex is about 33 S/cm and the complex can sustain a current density of at least 6 A/cm2 for more than 100 h without any degradation in conductivity. The weight and electrical conductivity of the sample, however, decrease when heated above 140°C. Both the PPY-I2 and PPY-Br2 complexes show good stability upon repeated redox cycling in both aqueous and organic electrolytes. © 1988.|
|Source Title:||Polymer Degradation and Stability|
|Appears in Collections:||Staff Publications|
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