The α-relaxation process in simple glass forming liquid m-toluidine. II. The temperature dependence of the mechanical response

We have measured, as a function of temperature and frequency, the velocity and attenuation of sound down to the glass transition of the fragile glass-forming molecular liquid m-toluidine. The mechanical relaxation process is compared with the dielectric one recently studied on the same substance. The Arrhenius plot of log(τ) vs 1/T shows that the relaxation time associated with ultrasonic measurements is the same as that previously found by the dielectric spectroscopy in the same temperature region.