William Feld (Committee Member), Eric Fossum (Advisor), Daniel Ketcha (Committee Member)
Master of Science (MS)
A series of 3,5-difluorinated systems, which are activated towards nucleophilic aromatic substitution (NAS) by the strongly electron withdrawing benzoxazole or benzothiazole groups, located meta to the fluorines were prepared and fully characterized. The monomers also carry various N-heterocyclic species on the non-fluorinated ring. The corresponding poly(arylene ether)s, some of which were copolymers with triphenylphosphine oxide-based monomers, were prepared via standard NAS polycondensation reactions. Incorporation of the monomers containing N-heterocycle units was determined by NMR spectroscopy. Characterization of the thermal properties was done using thermogravimetric analysis (TGA) and differential scanning (DSC). Most of the polymers displayed good film forming properties when cast from NMP solutions. The thermal properties of the polymers were very impressive with glass transition temperatures above 200°C and 5 % weight loss temperatures of over 470°C under a nitrogen atmosphere
Department or Program
Department of Chemistry
Year Degree Awarded
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