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Erschienen in: Tribology Letters 2/2007

01.11.2007 | Original Paper

The Effect of UV Stabilizer on the Photo Degradation of Perfluoropolyether Lubricants Used in Hard Disk

verfasst von: Jihye Lee, Sang-Wook Chun, Ho-Jong Kang, Frank E. Talke

Erschienen in: Tribology Letters | Ausgabe 2/2007

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Abstract

Ultraviolet (UV) light exposure can lead to photo degradation of perfluoropolyether (PFPE) lubricants, resulting in a change of their physical properties. In this article, 2,3,4,5,6–pentafluorobenzophenone was used as an ultraviolet stabilizer (UVS) to slow down the photo degradation of PFPE. PFPE/UVS mixtures were exposed to UV light and the mechanism of photo degradation was studied with nuclear magnetic resonance (NMR). Small amounts of UVS (less than 0.3 wt.%) were found to effectively stabilize both UV photo degradation at the main chain and the end chain of PFPE without affecting the thermal stability of PFPE. However, phase separation of PFPE and UVS was found to occur due to chemical incompatibility of the components.

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Metadaten
Titel
The Effect of UV Stabilizer on the Photo Degradation of Perfluoropolyether Lubricants Used in Hard Disk
verfasst von
Jihye Lee
Sang-Wook Chun
Ho-Jong Kang
Frank E. Talke
Publikationsdatum
01.11.2007
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 2/2007
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-007-9255-4

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