Metallic Polyaniline: Charge Transport, Moisture Effects and Magnetism

Marrero, T. R.; Cowan, D. L.; Bradford, D. C.; White, H. W.; Wragg, J. L.; Oldfield, F. F.

doi:10.1080/00986440008960502

Cited by 1 publication

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrical conductivity is also a function of the morphology,16 water content,13–15 temperature,19 and molecular weight 16–18. Therefore, eq 10 is useful for polyaniline synthesized under conditions similar to those of this work.…”

Section: Resultsmentioning

confidence: 82%

“…The fourth state of polyaniline is electrically conducting and is called emeraldine salt 1. The electrical conductivity of emeraldine salt can vary from 10 2 to 10 −4 S/cm10–12 and depends on the degree of oxidation and protonation (doping),1, 2, 12 water content,11, 13–15 morphology,16 molecular weight,16–18 and temperature 19. Figure 2 details the structures of the different states of polyaniline 1…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability of polyaniline in air and acidic water

Hobaica

2003

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Polyaniline is a member of the class of electrically conducting polymers, having possible commercial applications such as coatings. Aqueous-based polyaniline coatings are preferred over organic solvent or concentrated strong acid based coatings because water is not a pollutant. The overall goal of this study was to further the development of water-based polyaniline coatings by an examination of the effect of acidic water (pH 1.18) and air on polyaniline. Knowledge of the effect of water on the structure, molecular weight, electrical conductivity, and diffusion of the dopant assisted in ascertaining whether polyaniline degraded with water exposure. Knowledge of how Fourier transform infrared (FTIR) spectra would be affected by dry air was important for determining if polyaniline was chemically stable with time. The results showed that the molecular weight, ultraviolet-visible and FTIR spectra, and carbon-to-nitrogen molar ratio in the polymer backbone all remained unchanged during acidic water immersion. The constant nature of these physical parameters showed a high degree of water stability. A chloride ion diffusion coefficient of 2.8 to 85 ϫ 10 Ϫ9 cm 2 /h, the chloride concentration, and the electrical conductivity were also measured with the water immersion time. Aging polyaniline powders in a desiccator for 5 years showed no effect on the molecular structure, as indicated by the FTIR spectrum.

show abstract