The morphology, structure and state of dispersion of the filler particles within the elastomeric matrix were observed on a FEI Tecnai F20 and on a JEOL 2000EX Transmission Electron Microscopes, operating at 200 kV. Ultra-thin sections (50–60 nm) were prepared using a Leica Ultracut UCT ultramicrotome fitted with a 35° diamond knife. During the preparation, the samples were cooled at -80°C by liquid nitrogen and put onto copper grids.