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Е. А. Лисенков, В. В. Клепко, Ю. В. Яковлев
«Вплив температури на перколяційну поведінку систем на основі поліетиленоксиду та вуглецевих нанотрубок»
495–508 (2014)

PACS numbers: 61.41.+e, 61.43.Hv, 61.48.De, 64.60.ah, 72.80.Tm, 73.63.Fg, 81.40.Rs

The investigation of electrical properties and percolation behaviour of the systems based on the polyethylene oxide and carbon nanotubes is performed using the methods of impedance spectroscopy and optical microscopy. As revealed, the percolation threshold increases from 0.35% to 0.38%, and the critical index of conductivity changes from 1.44 to 2.36 with the temperature increasing. As ascertained, there are two types of conductivity in the investigated systems: ionic and electronic ones. As shown, under reaching the percolation threshold, when nanotubes dispersed in a polymeric matrix have the most specific surface, the activation energy of the system is minimal. As revealed, the polyethylene oxide–carbon nanotubes’ systems have the negative temperature coefficient of electrical resistance.