Electically Conductive Polymers

Figure 4. (A) Cyclic voltammograms over a range of scan rates for a redox polymer (poly-[Fe 5-amino-1,10-phenanthrotme)3]3+/>)91 and (B) p-doping and undoping of a conducting polymer (polypyrrole) (B). [(A) Reprinted from X. Ren and P. O. Pickup, Strong dependence of the election hopping rate in poly-tris(5-amino-1,10-phenan-throline)iron(HI/II) on the nature of the counter-anion J. Electroanal. Chem. 365, 289-292,1994, with kind permission from Elsevier Sciences S.A.]...

Sariciftci NS, Smilowitz L, Heeger AJ, Wudl F (1992) Photoinduced election transfer ftom a conducting polymer to hiickminsterfiillerene. Science 258 1474. doi 10.1126/ sdence.258.5087.1474... 

The use of TPEs in films and tapes is discussed in numerous reports. However, the latter provide essentially recipes of mixtures. They concern many technical fields pressure-sensitive adhesives, medical applications, barrier properties, porous films, etc., and some of them describe well defined electic properties, such as an electrostrictive system formed of a conductive polymer (polypyrrole, polyaniline, polythiophene) deposited onto opposing surfaces of a TPE film, e.g., a polyurethane [168]. The same comments hold for coating and painting where TPE are mainly used in the protection of metal or alloy substrates, such as electric wires some others impart additional functions to the protection, as is the case of optical fibers or textile fibers and different fabrics. Some few patents claim that a new TPE can be used as textile fiber with interesting properties, however these patents are almost never industrialized on the other hand, new TPE fiber processing techniques are proposed [169]. 

In another approach, the fact that crystalline monomeric charge transfer complexes exhibit electrical conductivity led to preparation of polymeric charge transfer complexes. These can be obtained from a polymeric electron donor and a monomeric election acceptor or from a polymeric acceptor and a monomeric donor, the former type being the more common, These polymers are not crosslinked and some are soluble, but their conductivities are generally low,... 

SCHEME 12.1 Synthesis of the bifunctional monomer, 2-methacryloyloxyethyl-3-pyrrolyl butyrate, via esterification reaction between 2-hydroxyethyl methacrylate and lH-pyrrole-3-butyric acid. (Brahim, S., A.M. Wilson, D. Narinesingh, E. Iwuoha, and A. Guiseppi-Elie. 2003. Chemical and biological sensors based on electrochemical election using conducting electroactive polymers. Microchim Acta 143 (2-3) 123. 

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