Structure property relationships in electrically conducting copolymers formed from pyrrole and N-methyl pyrrole

Kiani, M.S. and Mitchell, G.R. (1992) Structure property relationships in electrically conducting copolymers formed from pyrrole and N-methyl pyrrole. Synthetic Metals, 46 (3). pp. 293-306. ISSN 0379-6779 doi: 10.1016/0379-6779(92)90355-M

Abstract/Summary

A series of copolymers containing differing proportions of pyrrole and N-methyl pyrrole were prepared electrochemically at various temperatures using acetonitrile as the solvent. The resultant electrical conductivity decreases universally with increasing fraction of N-methyl pyrrole. Films prepared with p-toluene sulfonate as the dopant show a marked variation in structural anisotropy as revealed by X-ray scattering with apparent copolymer content. There is a clear trend between the variation in electrical conductivity and this structural anisotropy. Different patterns of behaviour are observed for films prepared using perchlorate as the dopant and this is attributed to the role of the dopant and final structure in determining the relative reactivities of the pyrrole and N-methyl pyrrole monomers. These observations support the concept that the introduction of methyl substituents into a polypyrrole chain results in a twisted chain conformation. The structure and properties of the resultant copolymer films are particularly sensitive to the preparation conditions.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/26812
Item Type	Article
Refereed	Yes
Divisions	Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
Publisher	Elsevier
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