The Effect of High Pressure on Electrical Relaxation in PPO and Electrical Conductivity in PPO Complexed with Lithium Salts.
Abstract
Audio frequency electrical conductivity and relaxation studies have been carried out on Parel 58 elastomer and Parel 58 elastomer complexed with a variety of lithium salts. The measurements have been carried out in vacuum over the temperature range 5-380 K and at pressures up to 0.65 GPA over the temperature range 230-380 K. Both the electrical conductivity for the complexed material and the electrical relaxation time associated with the alpha relaxation in the uncomplexed material exhibit VTF or WLF behavior. From the VTF analysis for both the vacuum electrical relaxation time and electrical conductivity, E sub a is found to be about 0.09 eV and T sub o is found to be about 40 C below the central glass transition temperature. In addition, it is found that the activation volumes for the electrical relaxation time and the electrical conductivity are the same when compared relative to t sub o. These results imply that the mechanism controlling ionic conductivity is the same as that for the alpha relaxation namely large scale segmental motions of the polymer chain. Keywords: Solid electrolytes, polymer electrolytes, poly(propylene oxide), activation energy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA168894
Entities
People
- John J. Fontanella
- Mary C. Wintersgill
Organizations
- United States Naval Academy