Activation energies of individual relaxation transitions with values of 379.73 kJ·mol−1 for α-transition, 65.53 kJ·mol−1 for β-transition and 45.98 kJ·mol−1 for γ-transition, calculated based on the linearized Arrhenius equation from the frequency-dependent shift of transition temperatures taken as peaks of tanδ(T, f ) in our earlier work [17], confirm that at temperature Tα the primary relaxation transition and at temperatures Tβ and Tγ the secondary relaxation transitions actually occur [16].