NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Low-wear partially fluorinated polyimidesTribological studies were conducted on five different polyimide solid bodies formulated from the diamine 2,2-bis 4-(4-aminophenoxy)pgenyl hexafluoropropane (4-BDAF) and the dianhydrides pyromellitic acid (PMDS) and benzophenonetetracarboxylic acid (BTDA). The following polyimides were evaluated 4-BDAF/PMDA, 4-BDAF/BTDA, 4-BDAF/80 mole percent PMDA, 20 mole percent BTDA, 4-BDAF/60 mole percent BTDA. Friction coefficients, polyimide wear rates, polyimide surface morphology and transfer films were evaluated at sliding speeds of 0.31 to 11.6 m/s and at temperatures of 25 C to 300 C. The results indicate that the tribological properties are highly dependent on the composition of the polyimide and on the experimental conditions. Two polyimides were found which produced very low wear rates but very high friction coefficients (greater than 0.85) under ambient conditions. They offer considerable potential for high traction types of application such as brakes.
Document ID
19860026437
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fusaro, R. L.
(NASA Lewis Research Center Cleveland, OH, United States)
Hady, W. F.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: ASLE Transactions
Volume: 28
ISSN: 0569-8197
Subject Category
Nonmetallic Materials
Accession Number
86A11175
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available