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Polyaniline: Interrelationships Between Molecular Weight, Morphology, Donnan Potential and Conductivity

Published online by Cambridge University Press:  25 February 2011

Alan G. Macdiarmid  and
Arthur J. Epstein
Alan G. Macdiarmid
Affiliation:
Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104–6323
Arthur J. Epstein
Affiliation:
Department of Physics & Department of Chemistry, The Ohio State University, Columbus, OH 43210–1106
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Abstract

Methods for significantly increasing the molecular weight of polyaniline are described. The conductivity of doped polyaniline is shown to be more directly dependent on its degree of alignment/crystallinity than on its molecular weight. The tensile strength of polyanilines films and fibers increases with increasing stretch alignment. An interpenetrating polymer system involving polyaniline which shows greatly enhanced conductivity at pH values where polyaniline has negligible conductivity is described. The doping level of polyaniline is shown to be dependent not only on the pH of the dopant medium but also on the presence of dissolved neutral salts. This new phenomenon is explained in terms of Donnan equilibrium effects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 565
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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