Accession Number : AD0434350


Title :   IMPROVEMENT OF HIGH TEMPERATURE PROPERTIES OF A FLUOROELASTOMER,


Corporate Author : ROCK ISLAND ARSENAL ILL


Personal Author(s) : Bergstrom,E W


Report Date : 14 Oct 1963


Pagination or Media Count : 18


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)


Descriptors :   *VULCANIZATES , *HEAT RESISTANT PLASTICS , *HALOCARBON PLASTICS , AGING(MATERIALS) , AGING(MATERIALS) , AGING(MATERIALS) , AGING(MATERIALS) , ADDITIVES , ELASTOMERS , THERMOSETTING PLASTICS , MECHANICAL PROPERTIES , TENSILE PROPERTIES , GAMMA RAYS , AMINES , AROMATIC COMPOUNDS , HALOGENATED HYDROCARBONS , FLUORINE COMPOUNDS , POLYMERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE