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Composites of polypyrrole and carbon black: Part III. Chemical synthesis and characterization

Published online by Cambridge University Press:  03 March 2011

Wesley A. Wampler ,
Krishnan Rajeshwar ,
R.G. Pethe ,
R.C. Hyer  and
S.C. Sharma
Wesley A. Wampler
Affiliation:
Sid Richardson Carbon Co., Fort Worth Research Center, Fort Worth, Texas 76106
Krishnan Rajeshwar*
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065
R.G. Pethe
Affiliation:
Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0065
R.C. Hyer
Affiliation:
Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0065
S.C. Sharma
Affiliation:
Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0065
*
a)Address correspondence to this author.
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Abstract

A new class of molecular composites of carbon black and an electronically conducting polymer, namely polypyrrole, has been synthesized by chemically polymerizing pyrrole in an aqueous dispersion of carbon black. The carbon black content of these composites can be varied from ∼5% to ∼85% (by weight). The surface area and density of these composites were compared to corresponding mixtures of carbon black and polypyrrole. The influence of carbon black on the efficiency of polymerization of pyrrole is described. The effect of carbon black content on the electronic conductivity of the composite has been mapped, and compared with the corresponding behavior of a mixture of carbon black and polyvinylchloride. The influence of the parent black characteristics (porosity, void volume, surface area) on the electronic conductivity of the resultant composite has been probed by comparing the behavior of composites derived from six commercial and experimental blacks. The temperature dependence of the composites has been studied as a function of the carbon black content. Finally, the application of these new materials is an environmental remediation scenario is demonstrated for Cr(vi) as a model pollutant.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 7 , July 1995 , pp. 1811 - 1822
Copyright
Copyright © Materials Research Society 1995

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References

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