Many-body effects in polymers: especially polyacetylene

March, N. H.

doi:10.1016/0166-1280(89)85116-4

Cited by 2 publications

(1 citation statement)

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“…Electrical behaviour of macromolecular polymeric insulating materials has been the subject of numerous investigations [1][2][3][4][5][6][7][8][9][10][11][12][13][14], owing to the fact that appreciable increase in the knowledge of the structure of such polymers has been gained from such measurements. However, although many works dealt with the d.c. electrical conductivity and conduction mechanisms of insulating polymers, comparatively little work has been published concerning the a.c. conductivity and its related conduction mechanisms [10 14].…”

Section: Introductionmentioning

confidence: 99%

Frequency and temperature dependencies of a.c. conductivity of polyvinyl alcohol (PVA)-CoCl2 composites

Elkholy

El-Shahawy

1993

J Mater Sci: Mater Electron

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The a.c. conductivity for polyvinyl alcohol (PVA)-CoCI2 composites prepared by a casting method has been measured at different frequencies (0.1-10 kHz) in the temperature range 300-450 K. At constant temperature, the frequency dependence of a.c. conductivity, cy(~o), was found to fit the established equation c~(c0) = AmSquite well. On the other hand, the temperature dependence of a.c. conductivity suggested an electronic hopping conduction mechanism in a thermally assisted electric field. Various theoretical mechanisms have been discussed to clarify the conduction processes in these samples. The correlated barrier hopping (CBH) mechanism, proposed by Elliott, was found to be the most appropriate one.

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