ELASTOMERIC DITHIOPOLYESTERS

Abstract

Elastomers have been prepared from an experimental liquid polymer formulation derived from a condensation product of mercaptoacetic acid and triethylene glycol. Two general types of these elastomers are discussed; one was obtained by reaction of the liquid polymer with organic and inorganic peroxides, the other by reaction of terminal mercapto groups with unsaturated aldehydes. Selected specimens of each type of elastomer were successfully compounded and vulcanized using conventional rubber processing equipment. The behaviour of these vulcanizates in fuels and synthetic ester base oils has been studied along with the effects of aging at elevated temperatures. The vulcanized dithiopolyesters showed excellent resistance to the swelling action of 70/30 iso-octane/toluene fuel mixtures. Ester base oils of the MIL-78O8A type were found to cause shrinkage. Elevated temperatures (350 F) consistently brought about rapid deteri oration of both vulcanized and raw polymer stocks.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1955
Accession Number
AD0080283

Entities

People

  • Fred W. Knobloch

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aldehydes
  • Biomedical And Dental Materials
  • Composite Materials
  • Contracts
  • Dermatologic Agents
  • Elastomers
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Organic Materials
  • Polymer Degradation
  • Polymeric Films
  • Polymers
  • Thermal Stability
  • United States

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Aquatic Ecology
  • Polymer Science and Engineering.