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M. LEBOVKA, A. GONCHARUK, Yu. BOYKO, L. LYSETSKYY, G. PUCHKOVSKA, T. GAVRYLKO, Ya. BARAN, and M. A. DROZD
«Interphase Interactions and Electric Conductivity in Carbon Nanotubes/Liquid Crystal Composites»
0701–0715 (2009)

PACS numbers: 61.30.Gd, 62.23.Pq, 64.75.Xc, 72.80.Nh, 78.30.Jw, 81.70.Pg, 82.70.Dd

Behaviour of the multiwall carbon nanotubes (NT) dispersed inside the mesogene matrix (EBBA) is studied by DSC, IR spectroscopy, and electrical conductivity measurements. The results show the presence of strong integra-tion of NTs in EBBA within the range of NT concentrations from 0.05 to 1 wt.%. Incorporation of NTs into EBBA increases the temperature of both nematicisotropic and crystalnematic transitions. IR data point to the in-crease of the energy of interface interaction with NTs concentration. Electri-cal-conductivity data demonstrate existence of the percolation threshold at NT concentrations exceeding 0.050.1 wt.%. The observed nonlinear de-pendences of electrical conductivity on the applied voltage and frequency bear witness to importance of the hopping mechanism of carrier transport and presence of wide distribution of the hopping-barriers heights.

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