Abstract
V-378A is a modified bismaleimide matrix resin which exhibits significant advantages over previously available bismaleimides and 350°F curing epoxy resins. The Tg of this new resin is in excess of 700°F. It has excellent tack at ambient temperatures and is available at prepreg resin solids contents as low as 30% for “net” resin (i.e. no bleed) cures. High modulus graphite unidirectional tapes based on V-378A exhibit excellent uncured or wet transverse strength. V-378A can be cured under standard low autoclave pressure of 100 psi and temperatures of 350°F similar to current 350°F curing epoxy systems. Unrestrained post cure at temperatures of 475 – 500°F are required to maximize elevated tem-perature strength retention. Cured V-378A/high modulus graphite composites exhibit strength retention at temperatures up to 600°F, excellent resistance to conditions of high humidity, no microcracking after repeated thermal spikes, and excellent tensile, compressive and shear strength. V-378A offers easy, epoxy-like processing characteristics with no volatile condensation products given off during cure with significantly su-perior high temperature strength retention after severe humidity aging.
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© 1984 Springer Science+Business Media New York
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Street, S.W. (1984). V-378A, A New Modified Bismaleimide Matrix Resin for High Modulus Graphite. In: Mittal, K.L. (eds) Polyimides. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7637-2_6
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DOI: https://doi.org/10.1007/978-1-4615-7637-2_6
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-7639-6
Online ISBN: 978-1-4615-7637-2
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