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Conductivity percolation in polyiodide/polymer complexes

journal contribution
posted on 01.08.1993, 00:00 authored by Maria ForsythMaria Forsyth, D Shriver, M Ratner, D DeGroot, C Kannewurf
Variable-temperature four-probe conductivity measurements and Raman spectroscopy were investigated for iodine in poly(propylene oxide) (PPO) and NaI3 in PPO. The Raman spectra indicate the presence of both triiodide and polyiodide species in samples of I2-doped PPO. The conductivity of these PPO/I2 samples increased with increasing I2 concentration and reached a plateau at approximately 12 vol % iodine. Raman spectra at 20 °C indicate that, at concentrations less than 23 vol % I3-, the dominant species is the triiodide. Polymer salt complexes with varying amounts of I3- appear to display a conductivity threshold near Tg, at 0.2 vol fraction of triiodide.

History

Journal

Chemistry of materials

Volume

5

Issue

8

Pagination

1073 - 1077

Publisher

American Chemical Society

Location

Washington, D.C.

ISSN

0897-4756

eISSN

1520-5002

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1993, American Chemical Society