Density, rho, viscosity, eta, and conductivity, sigma, measurements of binary mixtures containing the pyrrolidinium nitrate Protic Ionic Liquid (PIL) and propylene carbonate (PC), are determined at the atmospheric pressure as a function of the temperature from (283.15 to 353.15) K and within the whole composition range. The temperature dependence of both the viscosity and conductivity of each mixture exhibits a non-Arrhenius behaviour, but is correctly fitted by using the Vogel-Tamman-Fulcher (VTF) equation. In each case, the best-fit parameters, such as the pseudo activation energy, E-a* and ideal glass transition temperature, T-0 are then extracted. The excess molar volumes V-E, and viscosity deviations from the ideality, Delta eta, of each investigated mixture were then deduced from the experimental results, as well as, their apparent molar volumes, V-phi, thermal expansion coefficients alpha(p), and excess Gibbs free energies (Delta G*(E)) of activation of viscous flow. The V-E, alpha(E)(p), Delta eta values are negative over the whole composition range for each studied temperature therein. According to the Walden rule, the ionicity of each mixture was then evaluated as a function of the temperature from (283.15 to 353.15) K and of the composition. Results have been then discussed in terms of molecular interactions and molecular structures in this binary mixture. (C) 2012 Elsevier Ltd. All rights reserved.