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Influence of molecular structure on the lubrication properties of four different esters
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-4686-4010
2000 (English)In: Tribologia, ISSN 0780-2285, Vol. 19, no 4, p. 3-8Article in journal (Refereed) Published
Abstract [en]

The lack of published data on the chemical structures of lubricants makes it almost impossible to investigate the influence of structure on lubrication properties. In this investigation, the lubricating properties of three esters with known chemical structure have been investigated and compared with a commercial ester. The lubrication properties that were expected to be dependent on chemical structure such as film thickness and traction, viscosity and friction coefficients were compared by experiment. To measure the film thickness a Ball and Disc Apparatus was used, the traction coefficient was measured in a Jumping Ball Apparatus, the viscosity in a rotational cylindrical viscometer and the friction coefficient in a reciprocating friction and wear test apparatus. The results showed that molecular length has a significant influence on lubrication properties, with longer molecules giving the highest viscosity and greatest film thickness. The length of the molecule did not influence the coefficients of friction, but the traction coefficient, Υ, decreased with increasing molecular length.

Place, publisher, year, edition, pages
2000. Vol. 19, no 4, p. 3-8
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Applied Mechanics
Research subject
Machine Elements; Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-12799Local ID: bf45d190-d577-11db-8550-000ea68e967bOAI: oai:DiVA.org:ltu-12799DiVA, id: diva2:985750
Note
Godkänd; 2000; 20061109 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-01-10Bibliographically approved

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Tuomas, RogerAlmqvist, TorbjörnÅhrström, Bert-OlofBerg, Sven

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CiteExportLink to record
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