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Electrically conducting polyaniline-poly(acrylic acid) blends

✍ Scribed by Hu, Hailin; Cadenas, Jorge L.; Saniger, José M.; Nair, P. K.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
362 KB
Volume
45
Category
Article
ISSN
0959-8103

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✦ Synopsis

We report an electrically conducting polyanilineÈpoly(acrylic acid) blend coatings prepared by mixing the emeraldine base (EB) form of polyaniline (PANI) and poly(acrylic acid) (PAA) aqueous solution. The samples show a moderate electrical conductivity p. If they are immersed in an HCl aqueous solution, the conductivity of the samples is increased by two or three orders of magnitude and their thermal stability is also improved. Optical transmittance spectra show a complete protonation of PANIÈPAA blends after immersion in HCl aqueous solution. Fourier transform infrared spectroscopy studies indicate that the better thermal stability of p could come from the more stable protonated imine nitrogen ions. A low percolation threshold phenomenon is observed in PANIÈPAA blends, from a strong interaction between the carboxylic acid groups of PAA and the nitrogen atoms of PANI.

1998 SCI.

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