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Fracture toughness of polyimide filmsTwo aromatic polyimides and an aromatic polyamide-imide were tested in single edge notched tension. Fracture toughnesses, normalized to 25 micron film thickness ranged from 1.65 to 5.4 MPa m sup 1/2. LARC-TPI, a thermoplastic polyimide, showed evidence of crazing ahead of a growing crack whereas the other materials formed a shear yielded zone.
Document ID
19900016814
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Hinkley, J. A. (NASA Langley Research Center Hampton, VA., United States)
Mings, S. L. (AS&M, Inc., Hampton VA., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1989
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-TM-103473
NAS 1.15:103473
Report Number: NASA-TM-103473
Report Number: NAS 1.15:103473
Accession Number
90N26130
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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