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dc.contributor.authorRiley, Daniel J.en
dc.date.accessioned2014-03-14T20:19:27Zen
dc.date.available2014-03-14T20:19:27Zen
dc.date.issued1997-02-28en
dc.identifier.otheretd-11569282975860en
dc.identifier.urihttp://hdl.handle.net/10919/29824en
dc.description.abstractThe synthesis and characterization of phosphorus containing poly(arylene ether)s were investigated to determine the effect of phosphorus upon the thermal stability, mechanical strength, and fire resistance of thermoplastics. Phosphorus containing activated aromatic dihalides and bisphenols were synthesized in high purity. These monomers were successfully polymerized via nucleophilic aromatic substitution to afford high molecular weight polymers. It was determined that by incorporating the phosphine oxide moiety into the polymer backbone certain properties of the resulting poly(arylene ether)s were substantially improved, such as an increase in Tg, thermal stability in air, modulus, and char yield, compared with control poly(arylene ether sulfone)s. The high char yields obtained for these polymers in air, along with observed intumescence indicates that these materials have improved fire resistance. Preliminary cone calorimetry measurements support this conclusion. In addition, the phosphine oxide group in the backbone was reduced to a phosphine and successfully converted to a phosphonium bromide ionomer. The resulting system was further chemically modified to ionically bond second-order nonlinear optical chromophores to the backbone of selected poly(arylene ether)s. Initial results on corona poling of cast film at low temperature produced stable second harmonic generation in these materials, indicating that they may have promise in nonlinear optical applications.en
dc.publisherVirginia Techen
dc.relation.haspartTitle.pdfen
dc.relation.haspartThesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectnonlinear opticsen
dc.subjectFire resistanceen
dc.titleSynthesis and Characterization of Phosphorus Containing Poly(arylene ether)sen
dc.typeDissertationen
dc.contributor.departmentChemistryen
dc.description.degreePh. D.en
thesis.degree.namePh. D.en
thesis.degree.leveldoctoralen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineChemistryen
dc.contributor.committeechairMcGrath, James E.en
dc.contributor.committeememberGibson, Harry W.en
dc.contributor.committeememberRiffle, Judy S.en
dc.contributor.committeememberKingston, David G. I.en
dc.contributor.committeememberDillard, John G.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11569282975860/en
dc.date.sdate1998-07-25en
dc.date.rdate1998-02-28en
dc.date.adate1997-02-28en


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