| Autor: |
Robert J. Waltman, Hong Deng, Yu-Chen Wu, Hiroyuki Matsumoto |
| Jazyk: |
angličtina |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Tribology Online, Vol 7, Iss 1, Pp 41-45 (2012) |
| Druh dokumentu: |
article |
| ISSN: |
1881-2198 |
| DOI: |
10.2474/trol.7.41 |
| Popis: |
The thin film properties of some novel branched perfluoropolyether (PFPE) boundary lubricants are investigated as a function of molecular polarity and end-group bonding to the underlying carbon film. The PFPE main chain, comprised of n-perfluoroethylene oxide monomer units, is stiffer than the Fomblin Z main chain that is a copolymer of perfluoro-methylene oxide and -ethylene oxide monomer units. Terraced flow and bonding kinetics show decreased lubricant mobility compared to PFPEs based on a Fomblin Z main chain. Lubricant pick-up is reduced for the tetraol adduct due to the larger Hamaker constant and increased intermolecular cohesion. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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