Conductivité en courant continu des sulfates de polyanilines

Doriomedoff, Marina; Hautière-Cristofini, Françoise; Surville, Renaud de; Jozéfowicz, M.; Yu, L. T.; Buvet, R.

doi:10.1051/jcp/1971681055

Cited by 64 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…insulating states is usually monitored by the oxydo-¢ reduction of the polymer. But, another mechanism based on acido-basic reactions has been shown to be working also in polyaniline [17][18][19][20][21]. We have thus studied protonated and deprotonated forms of polyaniline.…”

Section: Resultsmentioning

confidence: 99%

Solid state 13C NMR in conducting polymers

et al. 1985

View full text Add to dashboard Cite

2014 Nous présentons une étude par RMN du carbone-13 du polythiophène, du polypyrrole et de la polyaniline. Les résultats ont été obtenus par polarisation croisée, avec découplage des protons et rotation à l'angle magique. En effectuant des polarisations sélectives, il a été possible de séparer les raies de résonance des carbones non équivalents et d'évaluer leur déplacement chimique. Les résultats permettent de déterminer la structure de la polyaniline et de préciser les effets de charge sur la chaîne polymérique dans le polythiophène et le polypyrrole. Nous discutons également l'importance du déplacement paramagnétique du carbone-13 dans ces systèmes. Abstract. 2014 We present a 13C NMR study of polythiophene, polypyrrole and polyaniline. The results have been obtained by cross-polarization with proton decoupling and magic angle sample spinning techniques. Using selective polarization, we have been able to separate the lines of inequivalent carbons and to estimate their chemical shift. From the results, we determine the structure of polyaniline and we discuss the oxidation scheme of the polymeric chain in polythiophene and polypyrrole. We also give an estimate of the 13C paramagnetic shift.

show abstract

Section: Resultsmentioning

confidence: 99%

Solid state 13C NMR in conducting polymers

et al. 1985

View full text Add to dashboard Cite

show abstract

“…Over the past two decades, conducting polymers and especially polyaniline (PANI) have been the object of intensive research. − Polyaniline is the generic term which describes the materials providing from oxidative polymerization of aniline. These materials can be used in supercapacitors, displays, − batteries, electromagnetic shielding, and microwave absorbing systems as well as for corrosion protection. − Conductivity of PANI depends on the degree of oxidation and of protonation of the polymeric backbone.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

1999

View full text Add to dashboard Cite

Raman and infrared reflection spectra in the backbone deformations and lattice modes range (10−1000 cm-1) of EB/ES-I and EB/ES-II polyanilines are discussed and compared with those of an oligomer (BQBBa) and of the constitutive bricks of the polyaniline skeleton: diphenylamine (BB), N,N‘-diphenyl-1,4-phenylenediamine (BBB), and N,N‘-diphenyl-1,4-phenylenediimine (BQB). Short-range structure, scaling motif, and disorder are discussed. Emphasis is given to the relationship between hybridization, short-range structure, disorder, and optical properties. Ring, CH deformations, and librational/translational modes appear very sensitive to the static and dynamic disorder. Results show that vibrational spectroscopy allows to distinguish the two classes of polyaniline (ES-I and ES-II), whatever the inserted anion. The sketch of a continuous change of angle between the rigid virtual N−ring−N bond is proposed to describe the static orientational disorder.

show abstract

“…Electrically conductive polymers are rigid or semirigid polymers . At present, the most feasible candidate for bulk applications is polyaniline (PANI); see eq 1 for the insulating emeraldine base (EB) form: , The EB form can be doped by strong acids (A - H + ) to form the electrically conductive emeraldine salt (ES) form; see eq 2 (for an early example, see ref ). ES is regarded as “intractable”, i.e., it does not melt before decomposition.…”

Section: Introductionmentioning

confidence: 99%

Thermoreversible Gels of Polyaniline: Viscoelastic and Electrical Evidence on Fusible Network Structures

Vikki¹,

Ruokolainen²,

Ikkala³

et al. 1997

Macromolecules

View full text Add to dashboard Cite

We demonstrate thermoreversible gelation of a conductive polymer, i.e., rubber-like melt processible electrically conducting compounds. Combination of viscoelastic and electrical conductivity measurements suggests network formation in the gel state and gel melting at elevated temperatures. The gels have been prepared by dissolving polyaniline in dodecylbenzenesulfonic acid (DBSA) using formic acid as a processing medium which was removed at the end. Importantly, without formic acid, reversible gelation and particle-free materials were not achieved even at the resolution of optical microscopy. For T < Tgel the materials behave elastically in compression experiments, the storage and loss moduli do not depend much on frequency, and the electrical conductivity is primarily electronic, probably due to high chain-to-chain hopping conductivity. For T > Tgel the onset of liquid-like flow is detected using modified ball drop method by dynamic mechanical analysis, the dynamic moduli become strongly frequency dependent, and the electrical conductivity drops orders of magnitude to the value corresponding to the ionic conductivity of DBSA, suggesting that the chains are not in direct contact. The physical crosslinks are probably localized mesomorphic domains which allow melting.

show abstract

Conductivité en courant continu des sulfates de polyanilines

Cited by 64 publications

References 0 publications

Solid state 13C NMR in conducting polymers

Solid state 13C NMR in conducting polymers

Vibrational Study of Short-Range Order and Structure of Polyaniline Bases and Salts

Thermoreversible Gels of Polyaniline: Viscoelastic and Electrical Evidence on Fusible Network Structures

Contact Info

Product

Resources

About