High lubrication performance of tribologically oriented fluoropolymer molecules analyzed by polarized infrared microspectroscopy
作者:
Iwao Sugimoto,
Shojiro Miyake,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 9
页码: 4083-4089
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.344966
出版商: AIP
数据来源: AIP
摘要:
The molecular structural changes induced in sputtered fluoropolymer film by tribological effects is pursued using polarized micro‐Fourier‐transform‐infrared (micro‐FTIR) spectroscopy. Hydrogenation of the carbon radicals produced by CF or CC bond cleavage is detected in the mildly rubbed region, together with C&squflg;C bond formation. Polarization measurements reveal that a rigid C&squflg;C‐bond‐rich framework is oriented along the sliding direction in a hardly rubbed region. This rigid carbon framework involves CF bonds with low polarizability. This structure greatly contributes to stable lubrication with a low friction coefficient, after the fluctuating lubrication characteristics that occur in the early rubbing stage have stabilized. These molecular structures are decomposed into C 3/4 C and C&squflg;C&squflg;C bonds through further elimination of CF moieties by abrasive hard rubbing by all means. Finally, they extremely decompose into amorphous carbon and metal carbide under severe conditions involving the reactive metals which appear after the film molecules are worn out.
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