The effect of synthesis route and ortho-position functional group on thermally rearranged polymer thermal and transport properties

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dc.contributor.advisorFreeman, B. D. (Benny D.)
dc.contributor.advisorPaul, Donald R.
dc.creatorSanders, David Finleyen
dc.date.accessioned2013-10-24T14:51:38Zen
dc.date.accessioned2017-05-11T22:35:08Z
dc.date.available2017-05-11T22:35:08Z
dc.date.issued2013-05en
dc.date.submittedMay 2013en
dc.date.updated2013-10-24T14:51:39Zen
dc.descriptiontexten
dc.description.abstractThis dissertation discusses the effect of synthesis route and ortho-position group on the thermal and transport properties of thermally rearranged polymers. Thermally rearranged polymers are polybenzoxazoles formed via the solid state rearrangement of ortho-functional polyimides. In this study, polymers were derived from 3,3'-dihydroxy-4,4'-diamino-biphenyl and 2,2'-bis-(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (HAB-6FDA). These HAB-6FDA polymers were synthesized using chemical and thermal imidization, and hydroxyl, acetate, propanoate, or pivalate ortho-position groups were considered. In these polymers, gas permeability increases as a function of conversion for all samples. The polyimide synthesis route does not affect the thermal or transport properties. However, the precursor ortho-position group strongly influences the thermal and transport properties of TR polymers. Additionally, it was determined that an increase in gas diffusivity was the primary cause of increased permeability as a function of thermal rearrangement.en
dc.description.departmentChemical Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/2152/21719en
dc.language.isoen_USen
dc.subjectMembraneen
dc.subjectGas separationen
dc.subjectThermally rearrangeden
dc.subjectPolymeren
dc.titleThe effect of synthesis route and ortho-position functional group on thermally rearranged polymer thermal and transport propertiesen

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