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Tearing of thin polyimide filmsFilms of BTDA-ODA polyimide up to 58 microns thick were torn at constant cross-head speed in 'trousers' tests. In common with previous results on polyolefins, the work of tearing was found to increase markedly with specimen thickness. A model for the increase, based on the volume of plastically deformed material adjacent to the crack plane, was found to be only qualitatively valid. The experimental slope of a plot of tearing energy (per unit area) against thickness was 70 MJ/cu m. Optical and scanning electron micrographs of torn films are discussed in regard to the modes of failure.
Document ID
19880041057
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hinkley, J. A.
(NASA Langley Research Center Hampton, VA, United States)
Hoogstraten, C. A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Journal of Materials Science
Volume: 22
ISSN: 0022-2461
Subject Category
Nonmetallic Materials
Accession Number
88A28284
Distribution Limits
Public
Copyright
Other

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