Differential Scanning Calorimetry as a Method for Indicating Hydrolysis of Urethane Elastomers

Abstract

Polyether and polyester urethane elastomers were aged in humidity (98%), water, and air at 160F, 170F, and 185F for 7, 14, 28, 42, 70, and 100 days. After each aging condition, tensile strength of the materials was determined and Differential Scanning Calorimetry (DSC) traces were run to observe changes in thermal transitions of the aged specimens. An effort was made to relate these transitions with actual reduction in tensile strength. Results were evaluated using DSC as a method for indicating hydrolytic degradation of the urethane elastomers studied in this investigation. Keywords: Thermal analysis; Endothermic; Glass transition temperature (Tg); Hydrolysis; Paracrystalline domain. (aw)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA197673

Entities

People

  • Alan R. Teets
  • David Flanagan
  • Dawn M. Crawford

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Calorimetry
  • Chemistry
  • Dissociation
  • Engineering
  • Ethers
  • Glass Transition Temperature
  • Materials
  • New York
  • Phase Separation
  • Physical Properties
  • Polymer Degradation
  • Polymers
  • Scanning
  • Tensile Strength
  • Test Methods
  • Transition Temperature
  • Transitions

Readers

  • Mathematics or Statistics
  • Polymer Science and Engineering.