Evaluation and design of polymer systems for enhanced microwave heating

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dc.contributor.authorLudman, Johnen
dc.contributor.committeechairStern, Curtis H.en
dc.contributor.committeememberScott, Elaine P.en
dc.contributor.committeememberThomas, William C.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:37:54Zen
dc.date.adate2009-06-11en
dc.date.available2014-03-14T21:37:54Zen
dc.date.issued1994-03-18en
dc.date.rdate2009-06-11en
dc.date.sdate2009-06-11en
dc.description.abstractMicrowave heating of different polymer systems (epoxy-amine. polypropylene-iron, carbon-black-filled perfiuoroelastomer) was evaluated using dielectric testing and monitored processing in a multimode microwave cavity. Dielectric measurements were made using a field perturbation technique and a transmission/reflection technique. The electric loss factor of the epoxy system continuously decreased during cure. Results for the microwave heating of the polypropylene-iron composites show that heating is enhanced with increased iron concentration and smaller iron particle size, although the penetration depth of the microwaves Is decreased, especially after the onset of percolation. A novel solidstate processing technique for thermoset systems was also evaluated. By milling the reactants to a fine powder, and mixing them completely, the extent to which diffusion limited the process was significantly reduced: increased milling resulted in higher activation energies. In addition to the inherent advantages of solid-state processing. it Is possible that processing times for solid-state processing could approach processing times for traditional melt processing.en
dc.description.degreeMaster of Scienceen
dc.format.extentxv, 191 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06112009-063233en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06112009-063233/en
dc.identifier.urihttp://hdl.handle.net/10919/43139en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.L836.pdfen
dc.relation.isformatofOCLC# 30692068en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.L836en
dc.subject.lcshMicrowave heatingen
dc.subject.lcshPolymers -- Thermal propertiesen
dc.titleEvaluation and design of polymer systems for enhanced microwave heatingen
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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