Dissociated ions and ion-ion interactions in poly(ethylene oxide) based NaCF3SO3 complexes

M. Kakihana, S. Schantz, L. M. Torell, J. R. Stevens

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54 Citations (Scopus)

Abstract

Raman scattering studies of molecular vibrations in poly(ethylene oxide) (PEO) containing NaCF3SO3 salt reveal the presence of both dissociated ions and ions in pair formations. For increasing salt concentration and temperature the degree of ion-pairing is found to increase at the expense of the amount of dissociated ions. At large salt content (O:M<10:1; O:M being the EO:Na concentration ratio) a second phase introduce bands in the spectra similar to that of crystalline NaCF3SO3. Increased ion-ion interaction may initiate the salt precipitation observed at elevated temperatures; the temperature dependence can be attributed to free volume dissimilarities of the host polymer and the dissociated salt.

Original languageEnglish
Pages (from-to)641-644
Number of pages4
JournalSolid State Ionics
Volume40-41
Issue numberPART 2
DOIs
Publication statusPublished - 1990 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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