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Filtering by: Creator Dugas, Diana V. Remove constraint Creator: Dugas, Diana V. Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis Subject Benzimidazoles Remove constraint Subject: Benzimidazoles

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  • Synthesis of polybenzimidazoles containing arylene sulfone and ether linkages

    Creator:
    Cook, Diana Lynn
    Abstract:
    Polybenzimidazoles were synthesized from 3,3'-diaminobenzidine (DAB) and dicarboxylic acids. The polymerizations using the dicarboxylic acid monomers were carried out in polyphosphoric acid (PPA) and phosphorus pentoxide/methansulfonic acid (PPMA) which acted as the solvent and condensing agent. The resulting polybenzimidazoles had inherent viscosities in the range of 0.12 to 0.84 dL/g....
    Resource Type:
    Masters Thesis
    Full Text:
    sulfone and ether linkages AN ABSTRACT OF THE THESIS OF Diana Lynn Cook for the degree of Master of

  • Synthesis of polybenzimidazoles from monomers containing flexible linkages

    Creator:
    Azmus, Dora J. Taylor
    Abstract:
    Polybenzimidazoles 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...
    Resource Type:
    Masters Thesis
    Full Text:
    sincere thanks to Diana Cook, who assisted with spectroscopy and solvent preparation. To Dr. R. W