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In situ polymerization of monomers for polyphenylquinoxaline/graphiteMethods 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.
Document ID
19730024351
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Serafini, T. T. (NASA Lewis Research Center Cleveland, OH, United States)
Delvigs, P. (NASA Lewis Research Center Cleveland, OH, United States)
Vannucci, R. D. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1973
Subject Category
Chemistry
Report/Patent Number
E-7732
NASA-TM-X-71454
Report Number: E-7732
Report Number: NASA-TM-X-71454
Meeting Information
Meeting: Ann. Soc. of the Plastics Ind., Reinforced Plastic Composites Conf.
Location: Washington, D. C.
Country: United States
Start Date: February 4, 1974
End Date: February 8, 1974
Accession Number
73N33084
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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