Electrochemical synthesis and characterization of conducting copolymers of biphenyl with pyrrole

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dc.contributor.author Simitzis, J en
dc.contributor.author Soulis, S en
dc.contributor.author Triantou, D en
dc.date.accessioned 2014-03-01T02:08:45Z
dc.date.available 2014-03-01T02:08:45Z
dc.date.issued 2012 en
dc.identifier.issn 00218995 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/29729
dc.subject conducting polymers en
dc.subject copolymerization en
dc.subject electrical conductivity en
dc.subject polyphenylene en
dc.subject polypyrroles en
dc.subject.other Applied potentials en
dc.subject.other Benzenoid rings en
dc.subject.other Compact morphology en
dc.subject.other Conducting copolymers en
dc.subject.other Copolymer films en
dc.subject.other Current-time curves en
dc.subject.other Electrical conductivity en
dc.subject.other Electrochemical stabilities en
dc.subject.other Electrochemical synthesis en
dc.subject.other Fourier transform infrared (FTIR) spectroscopies en
dc.subject.other FTIR en
dc.subject.other High conductivity en
dc.subject.other Low energies en
dc.subject.other Polyphenylenes en
dc.subject.other R value en
dc.subject.other Scanning electrons en
dc.subject.other Second group en
dc.subject.other Aromatic compounds en
dc.subject.other Conducting polymers en
dc.subject.other Copolymerization en
dc.subject.other Electric conductivity en
dc.subject.other Electropolymerization en
dc.subject.other Energy gap en
dc.subject.other Fourier transform infrared spectroscopy en
dc.subject.other Morphology en
dc.subject.other Polypyrroles en
dc.subject.other Scanning electron microscopy en
dc.subject.other Solids en
dc.subject.other Thermogravimetric analysis en
dc.subject.other X ray diffraction analysis en
dc.subject.other Copolymers en
dc.title Electrochemical synthesis and characterization of conducting copolymers of biphenyl with pyrrole en
heal.type journalArticle en
heal.identifier.primary 10.1002/app.36301 en
heal.identifier.secondary http://dx.doi.org/10.1002/app.36301 en
heal.publicationDate 2012 en
heal.abstract Copolymer films of biphenyl and pyrrole were synthesized by electrochemical polymerization. The influence of the applied potential used for the electropolymerization on the structure, morphology, electrical conductivity, and stability of the films was examined. From the analysis of the current-time curves, it was found that the growth of the copolymer films starts immediately. The films were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, X-ray diffraction analysis, and scanning electron microscopy-energy-dispersive X-ray analysis, and their electrical conductivity (σ), energy gap (Eg), and electrochemical stability were also determined. Based on the results, the copolymers were classified into three groups. The first includes the (PP-PPy)0.80 copolymer synthesized at the lowest potential Eox (0.80 V), having the highest ratio R (R = 0.35) of quinoid to benzenoid rings (calculated from FTIR), the highest value of σ (σ = 0.9 S/cm), the lowest Eg (Eg = 1.20 eV), and has compact morphology. The second group concerns the copolymers synthesized at higher potential (0.82 up to 0.86 V), having lower R (∼ 0.20), lower σ (below 0.4 S/cm), higher Eg (∼ 1.35 eV), and they are less compact with many pores. The third group includes the copolymers synthesized at even higher applied potential (0.88 and 0.90 V), having even lower R values (∼ 0.10), significantly lower σ (∼ 10-3 S/cm), even higher Eg (∼ 1.70 eV), and they are very porous. The applied potential during electropolymerization strongly affects the properties of the synthesized copolymers. Because of the combination of high conductivity, low energy gap, and partial solubility with significant electrochemical stability, these new copolymers are attractive candidates for many applications. © 2012 Wiley Periodicals, Inc. en
heal.journalName Journal of Applied Polymer Science en
dc.identifier.doi 10.1002/app.36301 en
dc.identifier.volume 125 en
dc.identifier.issue 3 en
dc.identifier.spage 1928 en
dc.identifier.epage 1941 en

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