A study of tribopolymerization under fretting conditions

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dc.contributor.authorMarin-Lafflèche, Pascaleen
dc.contributor.committeechairFurey, Michael J.en
dc.contributor.committeememberEiss, Norman S. Jr.en
dc.contributor.committeememberWard, Thomas C.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:33:41Zen
dc.date.adate2009-04-14en
dc.date.available2014-03-14T21:33:41Zen
dc.date.issued1990-05-05en
dc.date.rdate2009-04-14en
dc.date.sdate2009-04-14en
dc.description.abstractA study has been conducted to determine whether or not tribopolymerization can occur under conditions of fretting contact. Using a laboratory test consisting of oscillating hard steel balls loaded against flat steel or aluminum disks, effects of various monomers on friction, wear, and surface film formation were determined. Monomers, capable of polymerizing either by polycondensation or addition processes, were used at 1 % concentration in hexadecane. Under the conditions used (90N load, 65Hz frequency, 200μm peak-to-peak amplitude, 1 hour), the monomers tested reduced friction or wear or both. Fourier Transform Infrared Microscopy (FTIRM) analysis of the test specimens shows that organic material is present in the wear scar regions and depends on the metal used, the monoester structure, location on the disk, and the method of cleaning the surface after a test. With aluminum-on-steel the addition of I % styrene to hexadecane reduced the wear volume of the disk by over 650/0; furthermore, positive evidence of polystyrene was found via FTIRM. These results support the hypothesis proposed by Kajdas that addition-type tribopolymerization can be initiated by exo-electron emission. Under these conditions of expected relatively low surface temperatures, tribopolymerization does not occur with polycondensation-type compounds such as the C₃₆ dimer acid/ethylene glycol monoester. With this additive, known to be extremely effective in reducing wear at higher surface temperatures, effects on wear were small and no positive evidence of polymerization was found; however, metal soaps formed under these conditions.en
dc.description.degreeMaster of Scienceen
dc.format.extentxv, 228 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-04142009-040356en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04142009-040356/en
dc.identifier.urihttp://hdl.handle.net/10919/42060en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.M368.pdfen
dc.relation.isformatofOCLC# 22336885en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.M368en
dc.subject.lcshFretting corrosionen
dc.subject.lcshTribologyen
dc.titleA study of tribopolymerization under fretting conditionsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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