Nanocomposites and nanomaterials
Structure and Relaxation Properties of Flexible Polymers Filled with Nanoparticles Metal and Semimetal
Kolupaev B.B.1, Kolupaev B.S.2, Levchuk V.V.2, Maksymtsev Yu.R.2, Sidletskyi V.O. 2
1 Institute of Cybernetics of the Rivne International Economic and Humanitarian University named after Academician S. Demyanchuk. street S. Demyanchuk, 4, 33028 Rivne, Ukraine E-mail: Boris_Kolupaev@ukr.net
2 Rivne State University of Humanities. Plastova, 31, 33028, Rivne, Ukraine
Dependent on the type and content of the filler: the nonlinearity of the relaxation processes and the energy of their activation; hysteresis / temperature - heat capacity; electrophysical   (, ) = f(T), and  (Т),; viscous elastic Е(G, K) = f(T) , /during the cyclical process of "heating-cooling" GPS in the interval 298 K  Т  (Тg+10) К (where Tg is the glass transition temperature). It is shown that they have a place for systems based on PVC, PS, PMMA.
The specificity of the kinetic behavior of the composites is considered in terms of the existence of low and high frequency oscillatory modes of structural elements in the regions of - and -relaxation. It is established that the mechanism of longitudinal, bulk and deformation of the shear has a different molecular-kinetic nature, as well as the amount of energy dissipation in the region of dynamic mechanical loading of the material.
An experiment in the study of the change in the density of the composite showed that in the region (1,0  3,0) vol.% nano-dispersed graphite, there is a loosening of the structure of the GPS, which is described in diffusion coordinates.
The segmental nature of the chain  and -motions is investigated and it is shown that the splitting of the -relaxation region occurs at two maxima of the value Ср = f(Т). In this case, the quantitative correlation between the kinetic parameters  and  of relaxation transitions is established.
The deformation of the GPS in adsorption-active liquid media containing nanoparticles of metals and semimetals has been carried out. It is shown that in the case of tensile, compression, shear and volumetric deformation at 0.4 MHz frequency, structural changes of the surface of the material are obtained, which allow to obtain porous polymer sorbents, separating membranes, electro and thermal systems with a molecular packing coefficient (at Т  Тg ) 0.70  0.72. The results can be used to predict, obtaining and using metal-nanodisperse polymer systems in thermal and dynamic mechanical fields, investigate the processes of aging, deformation mechanism, the degree of heterogeneity and the complex physical and chemical properties of GPS.