Accession Number : AD0889122

Title :   Microfiber-Fluoroelastomer Composite Seal Materials.

Descriptive Note : Technical rept. Sep 67-Mar 70,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Sieron, J. K.

Report Date : AUG 1971

Pagination or Media Count : 29

Abstract : Very pure magnesium oxide fibers reinforced fluoroelastomer composite seal materials having excellent high temperature resistance and compression set resistance after long time periods at temperatures up to 500 F HAVE BEEN DEVELOPED. Outstanding compression set resistance was achieved by curing composites with peroxides. After post-curing by a vacuum oven-air oven process, the new seal material consists only of magnesium oxide fibers dispersed in a fluoroelastomer matrix which has very stable carbon-carbon crosslinks. Preliminary research also indicated that fluoroelastomer seal materials featuring a blend of magnesium oxide and carbon fiber reinforcement have very good heat aging resistance and low compression set. The best fiber reinforced compound had a compression set of 17% after 192 hours at 400 F and 43% after 72 hours at 500 F. (Author, modified-PL)

Descriptors :   *HALOGENATED HYDROCARBONS), *MAGNESIUM OXIDES), (*REINFORCED PLASTICS, (*REINFORCING MATERIALS, (*PLASTIC SEALS, HALOGENATED HYDROCARBONS), FLUORINE COMPOUNDS, COMPOSITE MATERIALS, CERAMIC FIBERS, ELASTOMERS, HEAT RESISTANT PLASTICS, AGING(MATERIALS), CROSSLINKING(CHEMISTRY), CURING AGENTS, SILICATES, COMPRESSIVE PROPERTIES.

Subject Categories : Adhesives, Seals and Binders
      Laminates and Composite Materials
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE