Elastomers for Service as Seals for Engine Lubricants and Hydraulic Fluids
Abstract
Six poly(fluoroalkoxy) phosphazene (PNF) elastomers were examined against a Viton control as candidates for O-rings which can function between -65 F and +350 F. The six PNF-compound vulcanizates represent the most advanced compound technology for PNF. Tensile data clearly show that these six PNF compounds cannot withstand hydraulic fluid MIL-H-83282A at +350 F. The tensile strengths deteriorate rapidly with immersion time. By contrast, the Viton control shows almost no change. While the compression set characteristics of the six PNF compounds show a significant improvement over those previously examined, it is expected that compression set, too, would suffer with increased conditioning time at +350 F in the hydraulic fluid. The low temperature flexibility of PNF vulcanizates is excellent, but other important physical properties show obvious deficiencies, particularly after conditioning in hydraulic fluid at +350 F.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1976
- Accession Number
- ADB009649
Entities
People
- David W Taylor
- Paul Lagally
- William Klemens