Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain

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 Fombl...

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Autores principales:	Robert J. Waltman, Hong Deng, Yu-Chen Wu, Hiroyuki Matsumoto
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2012
Materias:	tribology perfluoropolyether disk lubricant surface energy bonding kinetics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/6641fee997574b8aaf3f522df30a0d3e
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spelling	oai:doaj.org-article:6641fee997574b8aaf3f522df30a0d3e2021-11-05T09:25:11ZBoundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain1881-219810.2474/trol.7.41https://doaj.org/article/6641fee997574b8aaf3f522df30a0d3e2012-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/7/1/7_1_41/_pdf/-char/enhttps://doaj.org/toc/1881-2198The 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.Robert J. WaltmanHong DengYu-Chen WuHiroyuki MatsumotoJapanese Society of Tribologistsarticletribologyperfluoropolyetherdisk lubricantsurface energybonding kineticsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 7, Iss 1, Pp 41-45 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	tribology perfluoropolyether disk lubricant surface energy bonding kinetics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	tribology perfluoropolyether disk lubricant surface energy bonding kinetics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Robert J. Waltman Hong Deng Yu-Chen Wu Hiroyuki Matsumoto Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
description	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.
format	article
author	Robert J. Waltman Hong Deng Yu-Chen Wu Hiroyuki Matsumoto
author_facet	Robert J. Waltman Hong Deng Yu-Chen Wu Hiroyuki Matsumoto
author_sort	Robert J. Waltman
title	Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
title_short	Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
title_full	Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
title_fullStr	Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
title_full_unstemmed	Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain
title_sort	boundary lubricant film properties versus molecular polarity of perfluoropolyethers containing a pendant chain
publisher	Japanese Society of Tribologists
publishDate	2012
url	https://doaj.org/article/6641fee997574b8aaf3f522df30a0d3e
work_keys_str_mv	AT robertjwaltman boundarylubricantfilmpropertiesversusmolecularpolarityofperfluoropolyetherscontainingapendantchain AT hongdeng boundarylubricantfilmpropertiesversusmolecularpolarityofperfluoropolyetherscontainingapendantchain AT yuchenwu boundarylubricantfilmpropertiesversusmolecularpolarityofperfluoropolyetherscontainingapendantchain AT hiroyukimatsumoto boundarylubricantfilmpropertiesversusmolecularpolarityofperfluoropolyetherscontainingapendantchain
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Boundary Lubricant Film Properties versus Molecular Polarity of Perfluoropolyethers Containing a Pendant Chain

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