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Semi-2-interpenetrating polymer networks of high temperature systemsA semi-interpenetrating (semi-IPN) polymer system of the semi-2-IPN type is described in which a polymer of acetylene-terminated imidesulfone (ATPISO2) is cross linked in the presence of polyimidesulfone (PISO2). Six different formulations obtained by mixing of either ATPISO2-1n or ATPISO2-3n with PISO2 in three different proportions were characterized in terms of glass transition temperature, thermooxidative stability, inherent viscosity, and dynamic mechanical properties. Adhesive (lap shear) strength was tested at elevated temperatures on aged samples of adhesive scrim cloth prepared from each resin. Woven graphite (Celion 1000)/polyimide composites were tested for flexural strength, flexural modulus, and shear strength. The network polymers have properties intermediate between those of the component polymers alone, have greatly improved processability over either polyimide, and are able to form good adhesive bonds and composites, making the semi-2-IPN systems superior materials for aerospace structures.
Document ID
19850059620
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hanky, A. O.
(Kentron International, Inc. Hampton, VA, United States)
St. Clair, T. L.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: SAMPE Journal
Volume: 21
ISSN: 0091-1062
Subject Category
Nonmetallic Materials
Accession Number
85A41771
Distribution Limits
Public
Copyright
Other

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