Microviscosity of an ion-conducting polymer probed by fluorescence depolarization and dielectric spectroscopy

Sangmin Jeon, Sung Chul Bae, Jeff Turner, Steve Granick

Research output: Contribution to journalArticlepeer-review

Abstract

The local segmental motions of polypropylene oxide melt with variable amounts of added LiClO4 salt (0.3-2.2 mol% per repeat unit) were studied using dielectric relaxation spectroscopy and single photon counting methods after two-photon excitation of an unattached fluorescent dye, rhodamine 123, embedded at low concentration within the polymer. The lithium ions serve as junctions between polymer chains and increase the bulk viscosity. The measured microviscosity contains information on the local environment of ClO-4 ions.

Original languageEnglish (US)
Pages (from-to)4651-4655
Number of pages5
JournalPolymer
Volume43
Issue number17
DOIs
StatePublished - Jun 25 2002

Keywords

  • Dielectric spectroscopy
  • Fluorescence depolarization
  • Ion conducting polymer

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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