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dc.contributor.authorAzmus, Dora J. Taylor.
dc.dateMay-92
dc.date.accessioned2012-12-13T18:43:46Z
dc.date.available2012-12-13T18:43:46Z
dc.date.issued1992
dc.identifier.urihttp://hdl.handle.net/10945/24302
dc.descriptionCIVINS (Civilian Institutions) Thesis documenten_US
dc.description.abstractPolybenzimidazoles were synthesized from 3, 3', 4, 4'- tetraminobiphenyl (diaminobenzidine, or DAB) with orthoesters, carboxylic acid derivatives (an ester and an acid) and with m-benzenedialdehyde. The products were of low molecular weight, as evidenced by low inherent viscosity, except in the case of the dialdehyde plus DAB. The product of that system had inherent viscosities in the range of 0.7 dL/g, and formed strong, flexible films. Based on these results, a dialdehyde monomer was made from naphthalene disulfonyl dihalides and p-hydroxybenzaldehyde. In addition to the aldehyde end groups, this monomer contained internal sulfonate linkages, which were intended to increase the flexibility of the target polybenzimidazole which resulted when it was condensed with DAB. These polymerizations yielded poor poly-benzimidazoles, probably due to lack of purity of the new dialdehyde monomer. Another type of monomer was also produced by condensing DAB with p-hydroxybenzaldehyde. The resultant bibenzimidazole unit with two phenolic end groups shows promise for use in nucleophilic aromatic substitution polymerizations.en_US
dc.description.urihttp://archive.org/details/synthesisofpolyb1094524302
dc.language.isoen_US
dc.publisherMonterey California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleSynthesis of polybenzimidazoles from monomers containing flexible linkagesen_US
dc.typeThesisen_US
dc.contributor.corporateOregon State University
dc.contributor.departmentChemistry
dc.description.funderU.S. Naval Postgraduate School, CIVINS programen_US
etd.thesisdegree.nameMaster of Science in Chemistryen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.grantorOregon State Universityen_US


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