Molecular weight dependence of dielectric behavior of polymer electrolytes under shear flow

Shun Ichi Inoue, Yasuyuki Kimura, Kohzo Ito, Reinosuke Hayakawa

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2 Citations (Scopus)

Abstract

We have developed a new apparatus for measuring dielectric relaxation under shear flow, and applied it to a typical polymer electrolyte system, polypropylene oxide (PPO)-lithium perchloride, while changing the molecular weight of PPO. We observed a drastic increase in dielectric increment Δε and a drastic decrease in conductivity σ with increasing shear rate. The molecular weight dependence of σ and the relaxation time τ suggests that the conductivity is due to ion transport assisted by the conformational change of the entire polymer chain and the permittivity is ascribed to the ion fluctuation within a single chain assisted by the segmental motion of a polymer. On applying shear flow, the conformational change of a polymer chain is strongly suppressed, which would cause the decrease in conductivity.

Original languageEnglish
Pages (from-to)L665-L667
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume38
Issue number6 A/B
DOIs
Publication statusPublished - Jun 15 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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