Pressure and temperature variation of the electrical conductivity of poly(propylene glycol) containing LiCF{sub 3}SO{sub 3}. Technical report, 1 June 1998--31 May 1999
Technical Report
·
OSTI ID:679025
Electrical conductivity, dielectric relaxation and DSC studies have been carried out on poly(propylene glycol) (PPG, average molecular weight 1025) and PPG containing LiCF{sub 3}SO{sub 3}. The complex impedance studies were made at frequencies from about 1 mHz to 100 MHz at pressures up to 0.3 GPa (3 kbar) over the temperature range 215--365 K. Both the complex impedance and DSC studies were carried out in vacuum or at atmospheric pressure over a temperature range of about 100--375K. The inadequacy of the widely used Vogel Tammann Filcher (VTF) or Williams Landel Ferry (WLF) equations to describe the vacuum electrical conductivity data is discussed. It is shown that the Bendler-Shlesinger (BENSH) formalism is a better representation of the data, particularly in the region close to the glass transition. The first pressure derivative of the electrical conductivity decreases strongly with temperature giving rise to a large decrease in the apparent activation volume as temperature increases.
- Research Organization:
- Naval Academy, Dept. of Physics, Annapolis, MD (United States)
- OSTI ID:
- 679025
- Report Number(s):
- AD-A--365311/XAB; CNN: Contract N00014-99-AF00002
- Country of Publication:
- United States
- Language:
- English
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