T1 is a hypothetical temperature below which all viscous flow ceases (T1
¼ Tg 30 K), Kg is a nucleation parameter, DT is the
degree of supercooling, and f is a correction factor
accounting for the variation in the bulk enthalpy
of fusion per unit volume with temperature,
f ¼ 2Tc=ðT0m
þ TcÞ.