Rheological Properties of Polyacrylonitrile Solutions
Containing Highly Dispersed Carbon Nanotubes

E. A. Karpushkin, A. K. Berkovich, M. V. Artemov, and V. G. Sergeev

Department of Chemistry, Moscow State University, Moscow, 119891 Russia

e-mail: eukarr@gmail.com

Received January 23, 2014;
Revised Manuscript Received April 21, 2014

Abstract—Rheological properties of dispersions of carbon nanotubes in dimethylsulfoxide solutions of poly-
acrylonitrile are studied at different concentrations of the components. The viscosity values of all the studied
dispersions are substantially dependent on shear rate. For a number of systems, the energies of activation of
viscous flow are determined. The relationship of viscosity and the energy of activation of flow to the composi-
tions and possible structural features of dispersions is discussed. The concentration regime where a thermally
reversible mixed network exists with crosslinks formed by physical contacts of the polymer with nanotubes is
characterized.

DOI: 10.1134/S0965545X14050083

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