The electrical properties of iodine-doped poly(phenylacetylene) [PPA] solutions have been studied by means of low-frequency electrical conductivity and dielectric measurements in the frequency range 1 MHz-1 GHz. These data show that, in these systems, the conducting mechanism is different and more complicated than the typical additive behaviour of diluted ionic solutions. The high-frequency dielectric measurements display a pronounced dielectric dispersion characterized by a single Debye-type relaxation process. This dielectric behaviour can be attributed to the dipolar character of PPA, enhanced when the polymer interacts with the iodine doping species.
Conductometric and High-frequency Dielectric-properties of the Poly(phenylacetylene) Iodine System In Tetrahydrofuran Solutions / Cametti, Cesare; A., Furlani; G., Iucci; Russo, Maria Vittoria. - In: SYNTHETIC METALS. - ISSN 0379-6779. - 51:(1992), pp. 45-54. [10.1016/0379-6779(92)90251-D]
Conductometric and High-frequency Dielectric-properties of the Poly(phenylacetylene) Iodine System In Tetrahydrofuran Solutions
CAMETTI, Cesare;RUSSO, Maria Vittoria
1992
Abstract
The electrical properties of iodine-doped poly(phenylacetylene) [PPA] solutions have been studied by means of low-frequency electrical conductivity and dielectric measurements in the frequency range 1 MHz-1 GHz. These data show that, in these systems, the conducting mechanism is different and more complicated than the typical additive behaviour of diluted ionic solutions. The high-frequency dielectric measurements display a pronounced dielectric dispersion characterized by a single Debye-type relaxation process. This dielectric behaviour can be attributed to the dipolar character of PPA, enhanced when the polymer interacts with the iodine doping species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
