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    STP674

    Carbon-13 and Proton Nuclear Magnetic Resonance Spectroscopy of Thermosetting Polymers; Analysis of Tetraglycidyl Methylenedianiline/Diaminodiphenylsulfone Formulations

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    Abstract

    The proton nuclear magnetic resonance (NMR) spectrum of a tetraglycidyl methylenedianiline/diaminodiphenylsulfone (TGMDA/DDS) mixture contains regions suitable for the quantitative determination of the resin-to-curing agent ratio. This ratio, expressed in parts curing agent per hundred parts resin (phr), may be found from a simple expression relating the areas of the two aromatic proton signal regions. Preliminary results obtained on replicate samples of five known formulations were satisfactory with respect to reproducibility, but showed a -2 phr systematic error at curing agent contents above 30 phr. The method is undergoing refinement.

    The carbon-13 NMR spectrum of these formulations also is suitable for quantitative analysis, but a procedure has not yet been developed.

    Keywords:

    composite materials, tetraglycidyl methylenedianiline, diaminodiphenylsulfone, proton nuclear magnetic resonance, carbon-13 nuclear magnetic resonance, quantitative analysis, quality control


    Author Information:

    Poranski, CF
    Research chemist and section head, Naval Research Laboratory, Washington, D.C.,

    Moniz, WB
    Research chemist and section head, Naval Research Laboratory, Washington, D.C.,


    Committee/Subcommittee: D30.02

    DOI: 10.1520/STP36929S