Nanocomposites and nanomaterials

The complex of thermal and electrophysical properties of nanocomposite polychlortrifluoroethylene - tin dioxide
O.S. Tulzhenkova, M. I. Shut, T.G. Sichkar, M.O. Rokytskyi
National Pedagogical Dragomanov University. 
Pirogova St., 9, Kiev-01601, Ukraine.
E-mail: lesi4ca@gmail.com

Among of polymer oxide nanocomposites, high levels of protective and absorption properties have nanocomposites with given electrophysical and thermophysical properties and low content of nano-dispersed fillers. Polymer nanocomposites polychlortrifluoroethylene (PCTFE) - tin dioxide (SnO2) obtained by hot pressing. By X-ray diffraction analysis conducted quality control parameters and nanoparticles [1,2]. Are investigated experimentally density and total moisture content received composites. The concentration dependences of electrophysical properties of nanocomposites were studied.
The results of the study of the electrical conductivity of PCTFE-SnO2 composites allow to characterize their properties and determine the threshold flow.
An aggregate analysis of the nature of the change in density, total moisture content and electrophysical properties suggests that the percolation threshold is in the region of ≈ 3 vol%, which corresponds to a significant increase in the electrical conductivity of the system.
In order to more detailed analysis of events affecting the change in properties of nanocomposite additionally conducted calorimetric research of nanocomposites with different filler concentrations and their components in pure form. Demonstrate the expression of reverse structural changes in the system, accompanied by substantial heat release and loosening matrix.
The obtained polymer oxide nanocomposites are characterized by low porosity and high levels of thermophysical characteristics. This allows to operate the system of composites PCTFE - SnO2 for large loads in difficult weather conditions and in the presence of aggressive environments. 

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