Characterization of Model Perfluoropolyalkylethers by Miniaturized Thermal Oxidative Techniques–-Part II: Pressure Differential Scanning Calorimetry

Abstract

Commercially available and model perfluoropolyalkylether (PFPAE) fluids were characterized by pressure differential scanning calorimetry (PDSC). Details of the PDSC method are described and the stabilities determined by PDSC are compared to those obtained from the constant temperature miniaturized oxidation corrosion test described in Part I of this paper (1). Chemical structure-thermal oxidative stability relationships of the fluids as derived from the PDSC method are discussed. The destabilizing effect of an -OCF2-group is confirmed and other more subtle effects are noted.

Presented at the 48th Annual Meeting in Calgary, Alberta, Canada May 17–20, 1993

KEY WORDS:

• Lubricant Contamination
• Oxidation
• Gas Turbine Oils
• Adverse Environments Tribology

Notes

Presented at the 48th Annual Meeting in Calgary, Alberta, Canada May 17–20, 1993