Dynamical properties of epoxy composites filled with quartz powder

The dynamical mechanical properties of epoxy composites hired with differen t amounts of quartz powder were investigated. The loss tangent and the stor age Young's modulus were measured at frequencies between 5 and 323 Hz with a tension-compression device, from room temperature up to 460 K. The glass transition temperature and the apparent activation energy increase with fil ler content. The dynamic modulus also increases with quartz powder percenta ges. Test frequency and temperature dependence of these results were analyz ed within the scope of models presented in the literature for composite mat erials. (C) 2000 Elsevier Science S.A. All rights reserved.