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Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends

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dc.contributor.authorHuang, Jiangen
dc.contributor.committeechairMarand, Hervé L.en
dc.contributor.committeememberGibson, Harry W.en
dc.contributor.committeememberRiffle, Judy S.en
dc.contributor.committeememberWightman, James P.en
dc.contributor.committeememberWilkes, Garth L.en
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T21:23:04Zen
dc.date.adate2005-11-10en
dc.date.available2014-03-14T21:23:04Zen
dc.date.issued1995-08-05en
dc.date.rdate2005-11-10en
dc.date.sdate2005-11-10en
dc.description.abstractThis dissertation discusses results of crystallization kinetic, morphology and scattering studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/P(VF2-TFE)(95-5)) prepared by solution blending. The spherulitic growth rates of the α-phase PPVL from miscible blends with PVF₂ or P(VF₂- TFE)(95-5) were measured by polarized optical microscopy as a function of blend composition and isothermal crystallization temperature, Tx, between 160°C and 215.5°C. The PPVL weight fraction in the blends ranged from 100 to 10 wt%. Using the Lauritzen-Hoffman kinetic theory of polymer crystal growth, the equilibrium melting temperatures of the α-phase PPVL in both the PPVL/PVF₂ and the PPVL/P(VF₂-TFE)(95-5) blends have been determined, for the first time, directly from the spherulitic growth rate data. Analysis of the composition dependence of the nucleation constant, Kg suggests that the α-phase PPVL crystal/melt lateral interface free energy, Ï , in the blends decreases markedly with increasing PVF₂ or P(VF₂-TFE)(95-5) concentration.en
dc.description.degreePh. D.en
dc.format.extentxiii, 167 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11102005-141118en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11102005-141118/en
dc.identifier.urihttp://hdl.handle.net/10919/40312en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1995.H835.pdfen
dc.relation.isformatofOCLC# 34348067en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectMiscible Polymer Blendsen
dc.subjectPoly(vinylidenc fluoride)en
dc.subjectPoly(pivalolactone)en
dc.subject.lccLD5655.V856 1995.H835en
dc.titleUnderstanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blendsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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