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Adhesive and composite evaluation of acetylene-terminated phenylquinoxaline resinsA series of acetylene-terminated phenylquinoxaline (ATPQ) oligomers of various molecular weights were prepared and subsequently chain extended by the thermally induced reaction of the ethynyl groups. The processability and thermal properties of these oligomers and their cured resins were compared with that of a relatively high molecular weight linear polyphenylquinoxaline (PPQ) with the same chemical backbone. The ATPQ oligomers exhibited significantly better processability than the linear PPQ but the PPQ displayed substantially better thermooxidative stability. Adhesive (Ti/Ti) and composite (graphite filament reinforcement) work was performed to evaluate the potential of these materials for structural applications. The PPQ exhibited better retention of adhesive and laminate properties than the ATPQ resins at 260 C after aging for 500 hr at 260 C in circulating air.
Document ID
19820032340
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hergenrother, P. M.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
November 1, 1981
Publication Information
Publication: Polymer Engineering and Science
Volume: 21
Issue: 16, N
Subject Category
Nonmetallic Materials
Accession Number
82A15875
Distribution Limits
Public
Copyright
Other

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