Poly (Perfluoroalkylene Oxide) Oxadiazoles and Their Synthesis.
DEPARTMENT OF THE AIR FORCE WASHINGTON D C
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A perfluoroalkylene oxide dinitrile, an aromatic dinitrile N-oxide and an aromatic trinitrile are terpolymerized to obtain a polyperfluoroalkylene oxide oxadiazole containing pendent aromatic nitrile groups. The fluorinated polymer product can be cured with a poly-functional nitrile N-oxide to provide elastomers that are particularly useful in aircraft applications involving use temperatures ranging from about -70F to about 400F. For example, the elastomers can be employed as fuel tank sealants, coatings, O-ring seals, diaphragms, and the like.
- Organic Chemistry