Williams-Landel-Ferry 1955: log a_T = -C1(T-T_ref)/(C2+T-T_ref); time-temperature superposition; C1 ~17 + C2 ~52 K universal at Tg-ref; polymer-rheology master curves.
Williams-Landel-Ferry 1955: log a_T = -C1(T-T_ref)/(C2+T-T_ref); time-temperature superposition; C1 ~17 + C2 ~52 K universal at Tg-ref; polymer-rheology master curves.