dc.contributor.author	Dennis, Joseph M.	en
dc.contributor.committeechair	Long, Timothy E.	en
dc.contributor.committeemember	Turner, S. Richard	en
dc.contributor.committeemember	Matson, John B.	en
dc.contributor.committeemember	Moore, Robert Bowen	en
dc.contributor.committeemember	Bortner, Michael J.	en
dc.contributor.department	Learning Sciences and Technologies	en
dc.date.accessioned	2017-11-09T19:47:58Z	en
dc.date.available	2017-11-09T19:47:58Z	en
dc.date.issued	2017-04-18	en
dc.description.abstract	The 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.degree	Ph. D.	en
dc.format.medium	ETD	en
dc.identifier.other	vt_gsexam:11217	en
dc.identifier.uri	http://hdl.handle.net/10919/80034	en
dc.language.iso	en_US	en
dc.publisher	Virginia Tech	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	polysulfone	en
dc.subject	polyester	en
dc.subject	polyurea	en
dc.subject	segmented copolymers	en
dc.subject	isocyantate-free	en
dc.subject	decahydronaphthalate	en
dc.subject	BPA-replacement	en
dc.subject	free volume	en
dc.title	High Performance Engineering Polymers: Design, Properties, and Performance	en
dc.type	Dissertation	en
thesis.degree.discipline	Macromolecular Science and Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

High Performance Engineering Polymers: Design, Properties, and Performance

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