Perfluoropolyether

Perfluoropolyether (PFPE) is a type of liquid lubricant used in the aerospace industry for over 30 years.[1] The main properties of PFPE are being temperature resistant between 215 and 530 K (depending on specific composites), having very low outgassing compared to other fluids (vapour pressure of 6×10−8 Torr) and having a dielectric strength of around 15.7 MV/m.[2]

References
  1. Bradley Shogrin (August 1995). "Spontaneous Dewetting of a Perfluoropolyether" (PDF). National Aeronautics and Space Administration. Retrieved November 29, 2017.
  2. http://www.solvay.com/en/markets-and-products/featured-products/Fomblin-PFPE-Lubricants.html
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