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The Interaction Between Ammonia And Poly(pyrrole)

G. Gustafsson, I. Lundström, B. Liedberg, C. R. Wu, O. Inganäs, O. Wennerström
Published 1989 · Chemistry

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Abstract Reversible and irreversible interactions between ammonia and poly-(pyrrole) have been studied using electrical conductivity measurements, optical spectroscopy, Fourier transform infrared spectroscopy (FT i.r.), X-ray photoelectron spectroscopy (XPS) and elemental analysis. The results show that in addition to the previously reported reversible change of the electronic properties of poly(pyrrole) upon treatment with ammonia, there is also a large irreversible change if the material is exposed to high concentrations of ammonia or ammonia plus water vapour for a long period of time. The measurements also indicate that amide-type carbonyl groups, amine groups and ammonium ions could be present in the irreversibly changed polymer. The results are used as a basis for a discussion on the interaction between conducting polymers and ammonia in general and between poly-(pyrrole) and ammonia in particular.
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