High Performance Engineering Polymers: Design, Properties, and Performance

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dc.contributor.authorDennis, Joseph M.en
dc.contributor.committeechairLong, Timothy E.en
dc.contributor.committeememberTurner, S. Richarden
dc.contributor.committeememberMatson, John B.en
dc.contributor.committeememberMoore, Robert Bowenen
dc.contributor.committeememberBortner, Michael J.en
dc.contributor.departmentLearning Sciences and Technologiesen
dc.date.accessioned2017-11-09T19:47:58Zen
dc.date.available2017-11-09T19:47:58Zen
dc.date.issued2017-04-18en
dc.description.abstractThe facile synthesis of engineering thermoplastics enabled the development of structure-morphology-property relationships for a wide range of applications. Utilizing step-growth polymerization techniques, a myriad of reaction conditions probed various polymer families including polysulfones, polyesters, polyimides and polyureas. Copolymers ranging from random to segmented sequences provided insight into the influence of segment length on physical properties. Melting temperatures, glass transition temperatures, and mechanical properties responded systematically to segment length and morphology. Leveraging several complementary analytical techniques identified critical segment lengths required for phase separation and crystallization within these copolymers. Introduction of hydrogen bonding further complicated the interrelationships between thermal and mechanical properties, and possible co-crystallization between dissimilar segments occurred. Finally, branching out from linear copolymers to other topologies determined the influence of branch length on rheological and mechanical properties. The commercially-viable synthesis of these various thermoplastics further highlights the immediate impact on state-of-the-art materials, and the fundamental development described herein provides a road map for future development in this field.en
dc.description.degreePh. D.en
dc.format.mediumETDen
dc.identifier.othervt_gsexam:11217en
dc.identifier.urihttp://hdl.handle.net/10919/80034en
dc.language.isoen_USen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpolysulfoneen
dc.subjectpolyesteren
dc.subjectpolyureaen
dc.subjectsegmented copolymersen
dc.subjectisocyantate-freeen
dc.subjectdecahydronaphthalateen
dc.subjectBPA-replacementen
dc.subjectfree volumeen
dc.titleHigh Performance Engineering Polymers: Design, Properties, and Performanceen
dc.typeDissertationen
thesis.degree.disciplineMacromolecular Science and Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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