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Optimization of preparation conditions on the dielectric properties of polyaniline
Author(s) -
Thomas Rinku M.,
John Honey,
Mathew K. T.,
Joseph Rani,
George K. E.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29795
Subject(s) - polyaniline , sulfonic acid , dopant , aniline , materials science , conductive polymer , polymerization , perchloric acid , dielectric , polymer chemistry , polymer , polyaniline nanofibers , dielectric loss , conductivity , chemical engineering , inorganic chemistry , chemistry , organic chemistry , doping , composite material , optoelectronics , engineering
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, HNO 3 , H 2 SO 4 , HClO 4 , 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