Abstract.
Polyaniline (PANI) was synthesized by the oxidation of aniline hydrochloride in the presence of ammonium persulphate and hydrochloric acid. The polymerization reaction was carried out in several batches in different solvent media by changing the volume ratio of N,N -dimethyl formamide (DMF) and water as binary solvent mixture. The dielectric constant of the polymerization medium for each batch reaction was determined by measuring the capacitance with change in frequency. The UV spectra of the synthesized polyaniline solutions helped us to optimize the ratio of the binary solvent to get sufficient polymer growth and processability. Thin film of processable polyaniline was then deposited on glass slides coated with polyvinyl alcohol (PVA) crosslinked with maleic anhydride (MA). FTIR and XRD studies of the coated film were also done. AFM studies further helped in the morphological study of the film deposited. Finally, conductivity and ammonia gas-sensing property of the polyaniline film were also studied.
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SENGUPTA, P.P., KAR, P. & ADHIKARI, B. Influence of dielectric constant of polymerization medium on processability and ammonia gas sensing properties of polyaniline. Bull Mater Sci 34, 261–270 (2011). https://doi.org/10.1007/s12034-011-0058-8
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DOI: https://doi.org/10.1007/s12034-011-0058-8