Accession Number:

AD0903875

Title:

Synthesis and Evaluation of Polyfunctional Perfluorohypofluorites.

Descriptive Note:

Final rept. 1 Sep 70-31 Jan 72,

Corporate Author:

PCR INC GAINESVILLE FL

Personal Author(s):

Report Date:

1972-08-01

Pagination or Media Count:

181.0

Abstract:

The purpose of this program was to develop stable difluoroxyperfluorinated cross-linking agents for the vulcanization of perfluoroelastomers for potential use as seals and sealants on advanced aircraft and missile systems. Several methods were investigated for the preparation of high boiling fluoroxy terminated perfluoroethers and perfluoroalkanes for evaluation as cross-linking agents. In particular, cesium fluoride catalyzed flourination of acid flouride terminated perfluoroethers and perfluoroalkanes was investigated in detail. The conversions of the acid fluoride groups to fluoroxy groups were found to be low less than 25 in almost every case investigated. The highest conversions were obtained when the fluorinations were carried out on the performed cesium alkoxide salt of the acid fluoride in the presence of catalytic amounts of elemental iodine. Author

Subject Categories:

  • Polymer Chemistry
  • Adhesives, Seals and Binders
  • Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE