Dynamic electromechanical measurements of carbon black loaded SBR

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dc.contributor.authorHwang, Yawlinen
dc.contributor.committeechairBurton, Larry C.en
dc.contributor.committeememberStephenson, F. Williamen
dc.contributor.committeememberOnishi, Shinzoen
dc.contributor.departmentMaterials Engineeringen
dc.date.accessioned2014-03-14T21:41:04Zen
dc.date.adate2010-07-21en
dc.date.available2014-03-14T21:41:04Zen
dc.date.issued1988-07-14en
dc.date.rdate2010-07-21en
dc.date.sdate2010-07-21en
dc.description.abstractThe major objectives of this study were to examine electrical and electromechanical properties of SBR filled with carbon black in the 0-70 phr range. The experiments were divided into four parts: dielectric measurement, loss modulus and phase angle measurements, temperature rise measurement during stress cycling, and dynamic conductivity measurement. It is established that there are three distinct conduction regimes existing at carbon black loadings below, at, and above the percolation threshold. Characteristics of dielectric dispersion depend strongly on carbon black loading and frequency. Dielectric and AC conductivity measurements are shown to provide a nondestructive method to explore the carbon black network inside the rubber. Both loss modulus and phase angle are related to hysteresis properties, and to temperature rise due to compressive cycling. Measurements of these parameters will be discussed in detail, as functions of carbon black loading, stress and strain amplitudes, and oscillation frequency. These and other results can be understood in terms of the mechanics of the carbon black network. The variation of conductivity with strain amplitude is related directly to the interplay between the "persistent" and "transient" fractions of carbon black network. It is shown that, owing to its experimental accuracy and great sensitivity to carbon black network changes, the dynamic conductivity measurement is preferable to traditional modulus measurements for determining certain dynamic properties of carbon black filled rubbers.en
dc.description.degreeMaster of Scienceen
dc.format.extentxii, 103 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07212010-020458en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07212010-020458/en
dc.identifier.urihttp://hdl.handle.net/10919/43862en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1988.H972.pdfen
dc.relation.isformatofOCLC# 18616388en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1988.H972en
dc.subject.lcshCarbon-blacken
dc.subject.lcshRubber chemistryen
dc.subject.lcshTanks (Military science) -- Equipment and suppliesen
dc.titleDynamic electromechanical measurements of carbon black loaded SBRen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMaterials Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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