NDLI: Development of polyphenylquinoxaline graphite composites (Document No: 19730011884)

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Development of polyphenylquinoxaline graphite composites (Document No: 19730011884)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shdo, J. G. Hergenrother, P. M. Hoggatt, J. T.
Copyright Year	1973
Description	The potential of polyphenylquinoxaline (PPQ)/graphite composites to serve as structural material at 316 C (600 F)has been demonstrated using a block copolymer, BlCo(13), PPQ derivative. Initially, thirteen polyphenylquinoxalines were evaluated. From this work, four candidate polymers were selected for preliminary evaluation as matrices for HMS graphite fiber reinforced composites. The preliminary composite evaluation enabled selection of one of the four polymers for advanced composite preparation and testing. Using an experimentally established cure schedule for each of the four polymers, preliminary laminates of 50% resin volume content, prepared without postcure, were tested for flexure strength and modulus, interlaminar shear strength (short beam), and tensile strength and modulus at ambient temperature. A block copolymer (Bl Co 13) derived from one mole p-bis (phenylglyoxalyl) benzene, one fourth mole 3,3'-diaminobenzidine and three-fourths mole 3,3', 4,4'-tetraminobenzophenone was selected for extensive study. Tensile, flexural, and interlaminar shear values were obtained after aging and testing postcured BlCo(13) laminates at 316 C (600 F). The potential of PPQ/graphite laminates to serve as short term structural materials at temperatures up to 371 C (700 F) was demonstrated through weight loss experiments.
File Size	39578810
Page Count	145
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19730011884
Archival Resource Key	ark:/13960/t84j58b6b
Language	English
Publisher Date	1973-01-01
Access Restriction	Open
Subject Keyword	Materials, Nonmetallic Polyphenyls Composite Materials Reinforcing Fibers Graphite Construction Materials Polymerization High Temperature Research Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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