Abstract
It was previously found that sodium hydride and dimethyl sulfoxide (DMSO) form sodium methylsulfinylcarbanion, which ionizes the proton of amide group of aramid molecules to dissolve them homogeneously in DMSO. Metalated poly(p-phenylene terephthalamide) reacted with alkyl halides and epoxy compounds. By utilizing this reaction, the surface layer of Kevlar fibers was partly decorated by functional groups. The interfacial adhesion between fiber surface and epoxy-amine resin was evaluated by a pull-out test of monofilament. Kevlar filament surface-modified by polyfunctional epoxy resin was proven to give the highest adhesive strength. ESCA spectra supported an enrichment of epoxy on fiber surface. SEM micrographs of pulled out filament surface also suggested increased adhesion by epoxy decoration. The bending modulus of the composite of Kevlar cloth/epoxy-amine resin was increased by epoxy decoration and especially the T-peel strength of laminates with epoxy was remarkably increased. SEM micrographs revealed that the surface layer of Kevlar fibers was drastically damaged. This fact tells us that the ultimate adhesion has been achieved by our chemical method to the limit.
Similar content being viewed by others
Article PDF
References
D. Hull, “An Introduction to Composite Materials,” Cambridge University Press, England, 1982, Section 3.4.
Y. M. Mai and F. Castino, J. Mater. Sci., 19, 1638 (1984).
M. Takayanagi and T. Katayose, J. Polym. Sci., Polym. Chem. Ed., 19, 1133 (1981).
M. Takayanagi, T. Katayose, and T. Kajiyama, J. Appl. Polym. Sci., 27, 3903 (1982).
S. Ueta, Y. Nishihara, and M. Takayanagi, Bull. Fac. Eng., Kyushu Sangyo Univ., 22, 35 (1985).
M. Takayanagi and T. Katayose, J. Polym. Sci., Polym. Chem. Ed., 21, 31 (1983).
R. J. Morgan, C. O. Pruneda, and W. J. Steele, J. Polym. Sci., Polym. Phys. Ed., 21, 1757 (1983).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Takayanagi, M., Ueta, S., Lei, WY. et al. A New Chemical Method of Surface-Treatment of Kevlar Fiber for Composites with Epoxy Resin. Polym J 19, 467–474 (1987). https://doi.org/10.1295/polymj.19.467
Issue Date:
DOI: https://doi.org/10.1295/polymj.19.467
Keywords
This article is cited by
-
Modification of PPTA-based polymeric waste and adsorption properties for metal ions
International Journal of Environmental Science and Technology (2018)
-
Block copolymer of polyurethanes with poly(m-phenylene isophthalamide)
Journal of Polymer Research (1996)
-
Modification of polyurethane with wholly-rigid poly (m-phenylene isophthalamide)
Journal of Materials Science (1995)
-
Aromatic polyamides of para structure with substituents in the side chain of the macromolecules and fibres based on them: A review
Fibre Chemistry (1994)
-
An interphase layer in organic fibrous composites
Mechanics of Composite Materials (1993)