Structuring and Electric Conductivity of Polymer Composites Pyrolysed at High Temperatures

Jimsher Aneli1, Timur Natriashvili1 and Gennady Zaikov2
1Institute of Machine Mechanics 10, Mindeli str., 0186 Tbilisi, Republic Georgia; 2N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4, Kosygin str., 119334 Moscow, Russia
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On the basis of mixes of phenolformaldehide and epoxy resins at the presence of some silicon organic compounds and fiber glasses annealed in vacuum and hydrogen media the new conductive monolithic materials have been created. Conductive, magnetic and some other properties of these materials were investigated. It was established experimentally that the obtained products are characterized by semiconductive properties, the level of conductivity and conductive type of which are regulated by selection of technological methods. The density and mobility of carriers increase at increasing of annealing temperature up to definite levels. The temperature dependence of the electrical conductivity and charge mobility were described by Mott formulas. The magnetic properties of the annealed materials were investigated by ESR method. It was established that at annealing free radicals and other paramagnetic centers are formed. On the basis of the obtained results it was proposed that formation of conducting clusters and the charge transport between them is provided by mechanism of charge jumping with alternative longevity of the jump.

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