Investigating how rubber materials are affected by strain and strain rate (or frequency) in the room-to-curing temperature range allows to fully characterize them not only with respect to their processing behavior but also in view of their likely performances after vulcanization. Using a closed cavity dynamic rheometer, the adequate test protocols and data treatment, three gum elastomers, and three carbon black filled compounds were investigated in the 60-180 degrees C range. The article describes the test protocol and the associated data treatment that were developed to document the effects of strain and temperature in both the linear and the nonlinear domains. Complex modulus G* and third relative torque harmonic variations with strain amplitude and temperature are reported and discussed in details. A set of relatively simple mathematical equations are demonstrated to offer the possibility to summarize large quantities of experimental data through a limited number of parameters whose physical meaning can be explained with respect to known aspects of polymer and rubber sciences. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012