| dc.description.abstract | Tungstic oxide/polyaniline composite films were prepared by a double-pulse electrodeposition technique. The experimental results revealed that polyaniline deposition efficiency is very high at lower frequencies, on the contrary, WO3 deposition efficiency is high at higher frequencies. In general, polymerization of aniline is faster than the deposition of tungsten trioxide at all frequencies. The change of absorbance upon coloration or discoloration process. It may be due to the conductivities of WO3 layers.
Poly(aniline-co-o-toluidine) copolymers, were prepared in aqueous solution by electrochemical method. The ratio of the two monomers in the solution has a great influence on the copolymerization process and the electrochemical behavior of the copolymers. The characterization of copolymer has been carried out using electrochemical and spectroscopic methods, and their properties were compared with those of homopolymers, polyaniline, and poly(o-toluidine). The experimental results revealed that the response time of copolymer becomes longer as the ratio of aniline in the aqueous solution increases. However, when the ratios of aniline in the aqueous solution are below 50%, the color/discolor response rate is slower than that of the copolymer synthesized in the aqueous solution containing 50% aniline. Besides, the morphology of poly(aniline-co-o-toluidine) showed that, when the content of aniline in the aqueous solution is larger, the particle size is smaller. | en_US |