IMPROVEMENT OF HIGH TEMPERATURE PROPERTIES OF A FLUOROELASTOMER,

Abstract

Sixty-eight chemicals were evaluated as curatives for vinylidene fluoride/hexafluoropropylene (FPM) in an attempt to improve the retention of properties when measured at high temperatures. Several chemicals were found to be effective curatives for thin (.075 - .085) specimens. However, when thicker (0.5in) pieces were post cured they became porous and puffy. Efforts to eliminate this porosity were unsuccessful. Certain elastomers and thermosetting resins, when used as additives in N,N'-dicinnamylidene-1, 6-hexanediamine cured FPM significantly improved the tensile strength of the vulcanizates when measured at high temperature. An increase in tensile strength of more than 96% at 400 F was found in one instance. Porosity was not a problem with these vulcanizates. Attempts were also made to improve the properties at high temperature by using irradiation (gamma) curing. No significant improvement was found. Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 14, 1963
Accession Number
AD0434350

Entities

People

  • E. W. Bergstrom

Tags

DTIC Thesaurus Topics

  • Additives (Chemicals)
  • Elastomers
  • Fluorides
  • High Temperature
  • Macromolecules
  • Materials
  • Molecules
  • Polymers
  • Porosity
  • Resins
  • Synthetic Polymers
  • Tensile Strength
  • Thermosetting Plastics
  • Vulcanizates

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.