Accession Number:

ADA155030

Title:

The Reaction of Perfluoropolyalkylether Oil with FeF(3), AlF(3), and AlCl(3) at Elevated Temperatures.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB

Personal Author(s):

Report Date:

1985-04-01

Pagination or Media Count:

35.0

Abstract:

The interaction of perfluoropolyalkylether PFPE oil with ferric fluoride FeF3 and other Lewis acids at elevated temperatures under inert atmosphere was investigated to determine whether the reaction results in lubricant degradation. At 350 C, approx. 25 C below the onset of thermal degradation, PFPEs reaction with FeF3 yields acyl fluoride and ketone degradation products and also a decrease in the oils number average molecular weight. In the presence of small quantities of water, the acyl halide products hydrolyze, resulting in carboxylic acids. The oils reaction with aluminum fluoride at 350 C and aluminum chloride at 200 C also causes it to degrade measurably, The results indicate that PFPE oil can degrade at estimated bearing asperity contact temperatures in the presence of FeF3. Originator supplied keywords include Acyl fluorides, Asperity contact temperature, Bearings, Ferric fluoride, GPC, HPLC, IR, Ketones, Lubricant degradation, Perfluoropolyalkylether oil, Thermal degradation.

Subject Categories:

  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE