Accession Number:

AD0434350

Title:

IMPROVEMENT OF HIGH TEMPERATURE PROPERTIES OF A FLUOROELASTOMER,

Descriptive Note:

Corporate Author:

ROCK ISLAND ARSENAL ILL

Personal Author(s):

Report Date:

1963-10-14

Pagination or Media Count:

18.0

Abstract:

Sixty-eight chemicals were evaluated as curatives for vinylidene fluoridehexafluoropropylene 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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE