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  • MATERIALS, NONMETALLIC  (3)
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  • 1
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    Tailor making high performance graphite fiber reinforced PMR polyimides (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Studies performed to demonstrate the feasibility of using the polymerization of monomer reactants (PMR) approach to tailor make processable polyimide matrix resins are described. Monomeric reactant solutions containing the dimethyl ester of 3,3',4,4' -benzophenonetetracarboxylic acid, 4, 4' -methylenedianiline and the monomethyl ester of 5-norbornene-2, 3-dicarboxylic acid were used to impregnate Hercules HTS graphite fiber. Six different monomeric reactant stoichiometries were studied. The processing characteristics and elevated temperature mechanical properties of the PMR polyimide/HTS graphite fiber composites are described.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-TM-X-71616 , E-8126 , Ann. Reinforced Plastic Composites Conf.; Feb 04, 1975 - Feb 07, 1975; Washington, DC; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    In situ polymerization of monomers for polyphenylquinoxaline/graphite fiber composites (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Methods currently used to prepare fiber reinforced, high temperature resistant polyphenylquinoxaline (PPQ) composites employ extremely viscous, low solids content solutions of high molecular weight PPQ polymers. An improved approach, described in this report, consists of impregnating the fiber with a solution of the appropriate monomers instead of a solution of previously synthesized high molecular weight polymer. Polymerization of the monomers occurs in situ on the fiber during the solvent removal and curing stages. The in situ polymerization approach greatly simplifies the fabrication of PPQ graphite fiber composites. The use of low viscosity monomeric type solutions facilitates fiber wetting, permits a high solids content, and eliminates the need for prior polymer synthesis.
    Keywords: MATERIALS, NONMETALLIC
    Type: Annual Conference on the wide world of reinforced plastics; Feb 05, 1974 - Feb 08, 1974; Washington, DC
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    In situ polymerization of monomers for polyphenylquinoxaline-graphite fiber composites (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: In situ polymerization of monomers was used to prepare graphite-fiber-reinforced polyphenylquinoxaline composites. Six different monomer combinations were investigated. Composite mechanical property retention characteristics were determined at 316 C (600 F) over an extended time period.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-TN-D-7793 , E-7732 , Ann. Conf. of the Soc. of the Plastics Ind., Reinforced Plastic Composites Conf.; Feb 04, 1974 - Feb 08, 1974; Washington, DC; United States
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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