Please use this identifier to cite or link to this item: https://doi.org/10.1115/IJTC2007-44236
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dc.titleTribology of ultra-thin polymer films covalently bonded to a silicon surface: Effect of molecular structure
dc.contributor.authorSatyanarayana, N.
dc.contributor.authorSinha, S.K.
dc.date.accessioned2014-10-07T09:15:53Z
dc.date.available2014-10-07T09:15:53Z
dc.date.issued2008
dc.identifier.citationSatyanarayana, N.,Sinha, S.K. (2008). Tribology of ultra-thin polymer films covalently bonded to a silicon surface: Effect of molecular structure. 2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007 PART B : 845-847. ScholarBank@NUS Repository. <a href="https://doi.org/10.1115/IJTC2007-44236" target="_blank">https://doi.org/10.1115/IJTC2007-44236</a>
dc.identifier.isbn0791848108
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/86103
dc.description.abstractThe primary objective of the present study is to investigate the influence of the molecular structure (linear or with bulky side groups) of polymer films (of few nanometers thickness) covalently attached to Si surface on tribological properties. PE (polyethylene) and PS (Polystyrene) were selected to test the objective where PE has simple linear molecular structure while PS also has linear molecular structure but contains bulky benzene groups located at the side of the linear chain. PE and PS contains maleic anhydride groups and are chemisorbed onto the APTMS (3-aminopropyltrimethoxysilane) modified Si surface. AFM (atomic force microscopy), XPS (X-ray photoelectron microscopy) and water contact angle measurements are used to identify and characterize the polymer films. A micro-tribometer is used to identify the tribological properties in a sliding test using 4 mm diameter Si3N4 ball as the counterface. PE film has shown very low coefficient of friction and high wear durability when compared to PS film and moreover PS film did not show any improvement in the tribological properties when compared to bare Si surface. This study proves that even in film form polymer with linear molecular structure without the bulky side groups show good tribological properties and hence such polymers can be used as thin-films for reducing friction and wear of substrates, Si or other materials. The chemisorbed PE film may be able to find applications in micro-components made from Si surface as anti-stiction and anti-wear coating. Copyright © 2007 by ASME.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1115/IJTC2007-44236
dc.sourceScopus
dc.typeConference Paper
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1115/IJTC2007-44236
dc.description.sourcetitle2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007
dc.description.volumePART B
dc.description.page845-847
dc.identifier.isiutNOT_IN_WOS
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