Optimization of preparation conditions on the dielectric properties of polyaniline |
| |
| Authors: | Rinku M. Thomas Honey John K. T. Mathew Rani Joseph K. E. George |
| |
| Affiliation: | 1. Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Kochi, Kerala‐682 022, India;2. Department of Applied Sciences, Indian Institute of Space Science and Technology, Department of Space, ISRO, Thiruvananthapuram, India;3. Department of Electronics, Cochin University of Science and Technology, Kochi, Kerala‐682 022, India |
| |
| Abstract: | The dielectric response in the microwave field of polyaniline prepared at different temperatures and using different inorganic and organic dopants was studied. Chemical oxidative polymerization of aniline was done at low temperature (0–5°C), at room temperature, and at high (60°C) temperature using different inorganic dopants like HCl, HNO3, H2SO4, HClO4, etc. Polyaniline was also prepared with different organic dopants like camphor sulfonic acid, Toluene sulfonic acid, and Naphthalene sulfonic acid. All polymers formed were characterized using IR, TGA, DSC, and SEM, etc. The dielectric responses of all polymers are studied using cavity perturbation technique in the microwave field. The studies indicates that the polyaniline prepared with perchloric acid at room temperature shows higher conductivity and absorption coefficient compared with all other samples. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 |
| |
| Keywords: | conducting composites dielectric properties cavity perturbation dopants |
|
|
