Mechanism of high ionic conductivity in elastomeric networks

✍ Scribed by H. Cheradame; A. Gandini; A. Killis; J.F. Le Nest

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 425 KB
• Volume: 9
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(83)87044-x

✦ Synopsis

The viscoelastic properties and the ionic conductivity of polyetherpolyurethane networks containing alkali metal salts have been studied at various temperatures, salt concentrations and network structures. The reduced temperature, T-T,, is the predominant parameter which governs the viscoelastic behaviour and the ionic conductivity of these networks. Using the free volume concept an expresssion is derived for the ionic conductivity, irrespective of the macrostructure involved. The logarithm of the reduced conductivity, oT/uTa (which is the ratio of the conductivity at a given temperature to that at the reference temperature), is a linear function of the shift factor, log (IT, given by the dynamic mechanical properties. A comparison is made between the WLF parameters Ci and Cz, obtained from conductivity and viscoelastic measurements.