Pressure-temperature-volume (PVT) data have been obtained for poly(propylene glycol) of molecular weight 1025 containing LiCF3SO3 in the mole ratio 20:1. The PVT data were used to calculate the specific volumes, V/V-P=0,V-T=296 K, associated with the pressures and temperatures for previously published variable temperature, high-pressure electrical conductivity data. It is found that the electrical conductivity depends strongly on temperature at a constant volume. Consequently, traditional free volume theory is not consistent with the data. Finally, it is shown that the features of the electrical conductivity data can be accounted for by a recently developed generalized Vogel theory. (C) 2003 Elsevier Science Ltd. All rights reserved.