Thermal Stability of Sealants for Military Aircraft: Modification of Polysulfide Prepolymers with Ether and Thioether Monomers

Abstract

The effect of modifying Thiokol polysulfide prepolymers with dimercapto diethyl ether and dimercapto diethyl sulfide, on the resistance to heat ageing has been examined together with a commercially modified (PR-1770 B- 2) and an unmodified equivalent sealant (PR-1750 13-2). Mechanical test performed on specimens, after heat ageing at 182 deg C, indicated that the modifications did not improve the best resistance of polysulfide sealants.... Thermal properties, Dimercapto ethers, Heat ageing, Thiol-disulfide interchange reaction.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1993
Accession Number
ADA264079

Entities

People

  • P. J. Hanhela
  • W. Mazurek

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Chemical Shifts
  • Chemistry
  • Elastomers
  • Elongation
  • Embrittlement
  • Hardness
  • Materials
  • Measurement
  • Mechanical Properties
  • Military Aircraft
  • Molecular Weight
  • Polymers
  • Resistance
  • Tensile Strength
  • Test Methods
  • Thermal Stability

Readers

  • Polymer Science and Engineering.