DSC (Differential Scanning Calorimetry) and High Pressure Conductivity and Electrical Relaxation Measurements in PPO (Poly(Propylene Oxide) and PPO Complexed with Lithium Salts.

Abstract

Differential scanning calorimetry and high pressure electrical conductivity studies have been carried out on poly(propylene oxide) after the addition of various lithium salts. In addition, high pressure electrical relaxation measurements have been performed in the glass transition region on uncomplexed PPO. The vacuum conductivity measurements show that To is 30-40 C lower than the DSC Tg. Next, it is found that both To and Tg increase several K/kbar. In terms of the configurational entropy model, the isobaric data yield a reasonable value for the activation volume which is consistent with values previously reported for PEO complexed with alkali metal ions. The isothermal data yield a negative activation volume for PPO complexed with LiSCN. Finally, DSC and isothermal conductivity measurements show that neither Tg nor the apparent activation volume scale directly with ion size.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1985
Accession Number
ADA160342

Entities

People

  • John J. Fontanella
  • M. C. Wintersgill

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Advanced Electronics
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Alkali Metals
  • Amorphous Materials
  • Calorimetry
  • Chemical Engineering
  • Chemistry
  • Conductivity
  • Electrical Conductivity
  • Engineering
  • High Pressure
  • Jet Propulsion
  • Materials
  • Materials Science
  • Military Research
  • New York
  • Pressure Measurement
  • United States Naval Academy

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology