An unbranched perfluoropolyether is the current ball bearing lubricant for deep space flight. Measurements of viscosity are reported to moderate pressures for the calculation of pressure-viscosity coefficients to temperatures as low as -40 deg C. A free volume model predicts that a minimum alpha0(T) exists at higher temperature. The existence of a minimum pressure-viscosity coefficient is confirmed by viscosimetry at temperatures to 180 deg C.


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    Title :

    The pressure-viscosity coefficient of a perfluorinated polyether over a wide temperature range


    Contributors:
    Bair, S. (author)

    Published in:

    Publication date :

    2001


    Size :

    4 Seiten, 1 Bild, 6 Tabellen, 8 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English