Synthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymers

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dc.contributor.authorLambert, James M.en
dc.contributor.committeechairMcGrath, James E.en
dc.contributor.committeememberWilkes, Garth L.en
dc.contributor.committeememberWightman, James P.en
dc.contributor.committeememberHarris, Paul T.en
dc.contributor.committeememberOgliaruso, Michael A.en
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T20:14:28Zen
dc.date.adate2008-07-28en
dc.date.available2014-03-14T20:14:28Zen
dc.date.issued1986-02-01en
dc.date.rdate2008-07-28en
dc.date.sdate2008-07-28en
dc.description.abstractSegmented copolymer systems composed of an amorphous g1assy engineering polymer as one segment and a potentially anisotropic polyester as the second segment were synthesized and investigated. The engineering thermoplastic segment was based on various all aromatic poly(arylene ether sulfooes) derived from the nucleophilic aromatic substitution reaction between hydroquinone, biphenol, and dichlorodiphenylsulfone. This reaction was conducted in the presence of potassium carbonate and anhydrous aprotic dipolar solvents. Poly(biphenol terephthalate) and poly(oxybenzoate) were synthesized in situ as the second, potentially anisotropic, sem;crystalline segment. These segmented copolymers were synthesized either by solution t interfacial, or melt acidolysis techniques. The melt acidolysis technique was used to synthesize the segmented copolymers with high poly(arylate) contents. The morphology of the copolymers was found to be totally amorphous for those capolymers with low levels of the poly(arylates). They were semicrystalline when the poly(arylate) contents were increased beyond a critical value of about 15 weight percent. Differential scanning calorimetry, optical microscopy, and wide angle X-ray scattering were used to probe the copolymer morphology. The chemical structures of the segmented copolymers were studied through the use of Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy (both <sup>1</sup>H and ¹³C). As the weight percentage of the poly(arylate) was increased, a very significant improvement in the solvent resistance was noted. Evidence of anisotropy and liquid crystallinity in the copolymers was provided by optical microscopy, differential scanning calorimetry, and wide angle X-ray scattering.en
dc.description.degreePh. D.en
dc.format.extentxiii, 210 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07282008-135252en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07282008-135252/en
dc.identifier.urihttp://hdl.handle.net/10919/28436en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1986.L352.pdfen
dc.relation.isformatofOCLC# 14769344en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1986.L352en
dc.subject.lcshBlock copolymersen
dc.subject.lcshPolymersen
dc.subject.lcshThermoplasticsen
dc.titleSynthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymersen
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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