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

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

Research output: Contribution to journalArticle

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
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume38
Issue number6 A/B
Publication statusPublished - Jun 15 1999
Externally publishedYes

Fingerprint

Shear flow
shear flow
molecular weight
Molecular weight
Electrolytes
electrolytes
Polypropylene oxides
polymers
Polymers
polypropylene
conductivity
lithium oxides
Dielectric relaxation
Ions
Relaxation time
Shear deformation
ions
Lithium
Permittivity
relaxation time

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Molecular weight dependence of dielectric behavior of polymer electrolytes under shear flow. / Inoue, Shun Ichi; Kimura, Yasuyuki; Ito, Kohzo; Hayakawa, Reinosuke.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 38, No. 6 A/B, 15.06.1999.

Research output: Contribution to journalArticle

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