Reinforcement of nano composite materials requires the consideration of various length and time scales. In this paper it is shown, how dynamical properties of the rubber phase localized on the filler particles will contribute in a special way to the reinforcement and the viscoelastic properties of the elastomers. The contribution from the disorder surface determines mainly the viscoelastic behavior in some of the frequency regimes. © 2005 Elsevier Ltd. All rights reserved.