Accession Number:

ADA383437

Title:

Surface Tribochemistry: PFPAE Lubricants

Descriptive Note:

Final rept. 1 Jun 1996-31 Aug 1999

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA

Personal Author(s):

Report Date:

2000-12-16

Pagination or Media Count:

11.0

Abstract:

The principle objective of this research project was to develop and apply methods for study of the surface chemistry of long chain oligomeric species such as perfluoropolyalkylether PFPE lubricants. The PFPEs are liquid lubricants used for a number of very high temperature applications. They typically have molecular weights in the range 1,000 - 10,000 amu and have very low vapor pressures. These molecular weights correspond to structures with 20 to 200 CF2 units. The primary accomplishment of the work performed under this grant was the design, development, and testing of a dosing system that allows the introduction of such compounds into an ultrahigh vacuum system used for surface analysis. This device has been tested with a study of the adsorption an desorption of long chain alkanes and PFPEs on the surface of graphite. The device is now being used for studies of the adsorption and desorption of high molecular weight, low vapor pressure species such as PFPE liquid lubricants and vapor phase lubricants such as tricresylphosphate TCP.

Subject Categories:

  • Polymer Chemistry
  • Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE