DSC, Electrical Conductivity, and NMR Studies of Salt Precipitation Effects in PPO (Poly(propylene oxide) Complexes.

Abstract

DSC and electrical conductivity measurements of poly(propylene oxide) complexed with sodium iodide and potassium thio cyanide are reported. In addition, 23Na NMR measurements of PPO8NaI, both at ambient and elevated pressure (2.0 kbar) have been performed. The DSC data clearly indicate that the salt precipitates out of the complexes at about 85 C for NaI and 60 C for KSCN. These effects are manifested by a dramatic departure of the conductivity from VTF behaviour, and a relatively sharp drop in mobile sodium concentration deduced from nuclear magnetic resonance measurements at somewhat elevated temperature (about 80 C). High pressure NMR linewidth measurements are consistent with a pressure-induced increase in glass transition temperature.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA182350

Entities

People

  • John J. Fontanella
  • Kresimir J. Adamic
  • Mary C. Wintersgill
  • Steven G. Greenbaum

Organizations

  • Hunter College

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Spectra
  • Alkali Metals
  • Conductivity
  • Electrical Conductivity
  • Glass
  • Glass Transition Temperature
  • High Pressure
  • High Temperature
  • Hydrostatic Pressure
  • Low Temperature
  • Magnetic Resonance
  • Materials
  • Nuclear Magnetic Resonance
  • Precipitation
  • Pressure Measurement
  • Resonance
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Materials Science and Engineering.
  • Polymer Science and Engineering.