Friction and Wear Characteristics of Polyimide and Filled Polyimide Compositions in Vacuum (10(exp -10) mm Hg).
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
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The friction and wear characteristics of polyimide and filled polyimide compositions were examined in a vacuum environment 10exp -10 mm Hg. Copper-filled to 50 weight percent compositions as well as graphite- and molybdenum-disulfide-filled compositions were studied. The results of the investigation indicate that, to obtain effective lubrication low friction and wear, a transfer of the polyimide film to the mating surface must be achieved. In its absence, high friction occurred with all polyimide materials. With copper addition, a minimum in wear rate was obtained at 30 weight percent copper. Both friction and wear increased with the addition of graphite as a filler to the polyimide. With the addition of molybdenum disulfide, marked decreases in both friction and wear occurred.
- Polymer Chemistry
- Inorganic Chemistry