Solid-state processing of thermoplastic polymers

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dc.contributor.authorVick, Lindaen
dc.contributor.committeechairKander, Ronald G.en
dc.contributor.committeememberDavis, Richey M.en
dc.contributor.committeememberDillard, David A.en
dc.contributor.committeememberLoos, Alfred C.en
dc.contributor.committeememberLove, Brian J.en
dc.contributor.departmentMaterials Engineering Scienceen
dc.date.accessioned2014-03-14T21:17:44Zen
dc.date.adate2006-08-14en
dc.date.available2014-03-14T21:17:44Zen
dc.date.issued1996en
dc.date.rdate2006-08-14en
dc.date.sdate2006-08-14en
dc.description.abstractAlthough compaction and sintering of polymeric powders has been investigated since the early 1970's, this processing method is not widely used, possibly because the fundamental mechanisms which control compaction and sintering have never been fully understood. This study has made significant contributions to our understanding of compaction and sintering of polymers. It was demonstrated that mechanical properties (yield strength, modulus) and physical characteristics (degree of physical aging, glass transition temperature, presence of crystallinity) of the particles, and thus, powder processing, storage, and handling techniques, affect the ability of the polymer to be successfully compacted. The difficulties encountered in sintering polymeric compacts were explained in terms of a loss of configurational entropy of the polymer molecules during compaction, which caused large-scale dimensional recovery in the particles upon heating above T g. Hot compaction (above room temperature, but below Tg) was not found to be useful in eliminating recovery during pressureless sintering. However, consolidation of compacts formed at room temperature (by heating 10-20°C above T g and applying a small pressure (less than 50 kPa» was shown to be a promising processing method.en
dc.description.degreePh. D.en
dc.format.extentxiii, 156 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08142006-110121en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08142006-110121/en
dc.identifier.urihttp://hdl.handle.net/10919/39161en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1996.V535.pdfen
dc.relation.isformatofOCLC# 35286171en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1996.V535en
dc.titleSolid-state processing of thermoplastic polymersen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineMaterials Engineering Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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