Electrically anisotropic materials: polyaniline particles organized in a polyurethane network
✍ Scribed by Stejskal, Jaroslav; Špírková, Milena; Quadrat, Otakar; Kratochvíl, Pavel
- Book ID
- 101229111
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 328 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
Electrically conducting polyaniline particles were organized by an electric Ðeld in a liquid medium, which was subsequently polymerized to produce a polyurethane network. The changes in electrical conductivity during polymerization were recorded. The chains of conducting polyaniline particles oriented in the direction of the electric Ðeld became Ðxed in the polymer network. In this way, electrically anisotropic materials were produced. The conductivity in the direction parallel to the orientation was several times higher than that in the perpendicular one. The conductivity of these composite materials increases with temperature, while the electrical anisotropy decreases. The e †ect of electrical anisotropy is explained by simple geometric considerations.