The mechanical properties of iron‐epoxy particulate composites were studied from the glasslike state through the transition region to the rubberlike state in dynamic loading applied by a Dynastat and a Dynalizer apparatus. The effect of filler content on the viscoelastic properties was studied by using six distinct filler concentrations. Measurements were carried out at frequencies between 0.1 and 100 Hz and temperatures from 50 to 120 °C. Composite curves for both the storage and the loss moduli along a wide frequency range were made by applying the time‐temperature super‐position principle. Moreover, the Takayanagi model was used for the prediction of the filler contribution on the storage compliance(D′)in the transition region. Finally, the effect of filler content on the relaxation spectraHand the glass transition temperature was examined.