Abstract
Properties of carbon-epoxy composites are strongly dependent on the epoxy cure-cycle. Availability of techniques for in situ monitoring of cure kinetics would enhance control of optimized production of composite structures. Experiments are described which exploit the microviscosity dependence of the fluorescence yield of p-(NfN-dialkylamino)benzylidene malononitrile (R. Loutfy, Macromolecules 14 270 (1981)) for monitoring epoxy cure kinetics. Epoxy resins based on either diglycidylether of bi sphenol-A (DGEBA) or tetraglycidyl-d iaminod iphenyl methane (TGDDM) containing 0.5 wt % of the malononi tr ile as a solute probe show an increase of the fluorescence intensity (If) at the probe’s emission band maxima (495 nm) as a function of the degree of cure. Fluorescence-derived profiles for cure kinetics (If as a function of cure time) closely follow the kinetic profiles derived by differential scanning calorimetry (DSC). The fluorescence yield of the TGDDM monomer was found to be viscosity-dependent and therefore, possesses a unique “self-probing” capability which permits monitoring of its viscosity during cure.
Article Note
This work was performed under the McDonnell Douglass Independent Research and Development Program.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
C.A. May, M.R. Dusi, J.S. Fritzen, D.K. Hada, M.G. Maximovich, and K.S. Thrasher, Org, Coat. Appl. Polym. Sci. Proc., 47, 419 (1982).
J.M. Barton, Thermochim. Acta, 30, 153 (1979).
P. Hedrig, Dielectric Spectroscopy of Polymers, Halsted Press, (Wiley) NY, 1977, p. 332.
N.F. Sheppard, S.L. Garverick, D.R. Day, and S.D. Senturi, Proc. 26th SAMPE Symposium, (1981), p. 65.
J. Stark and P. Lipp, Z. Physik Chem., 86, 36 (1913).
G. Oster and Y. Nishijima, J. Am. Chem. Soc., 78, 1581 (1956).
Th. Forster and G. Hoffmann, Z. Physik. Chem. (n.F.), 75, 63 (1971).
S. Sharafy and K.A. Muskat, J. Am. Chem. Soc., 93, 4119 (1971).
G. Jones, W.R. Jackson, and A.M. Halpern, Chem. Phys. Letters, 72(2), 391 (1980).
C.J. Tredwell and A.D. Osborne, J. Chem. Soc. Faraday Trans., 2, 76, 1627 (1980).
A.D. Osborne, J. Chem. Soc. Faraday Trans., 2, 76, 1938 (1980).
A. T. Eske and K.R. Nagvi, Chem. Phys. Letters, 63, (1), 128 (1979).
R.O. Loutfy, Macromolecules, 14, 270 (1981).
R.O. Loutfy, J. Polym. Sci. Polym., Phys. Ed., 20, 825 (1982).
R.O. Loutfy and K.Y. Law, J. Phys. Chem., 84, 2803 (1980).
K.Y. Law and R.O. Loutfy, Macromolecules, 14, 587 (1981).
K.Y. Law, Chem. Phys. Letters, 75, 545 (1980).
R.O. Loutfy and D.M. Teegarden, Macromolecules, 16, 452 (1983).
G.L. Hagnauer, Ind. Res. and Dev., April 1981, p. 128.
E.S. Swinbourne, “The Analysis of Kinetic Data,” Nelson, London, 1971, Chap. 4.
E.A. Guggenheim, Phil. Mag., 2, 538 (1926).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1984 Plenum Press, New York
About this chapter
Cite this chapter
Levy, R.L., Ames, D.P. (1984). Monitoring Epoxy Cure Kinetics with a Viscosity-Dependent Fluorescent Probe. In: Lee, LH. (eds) Adhesive Chemistry. Polymer Science and Technology, vol 29. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2435-5_11
Download citation
DOI: https://doi.org/10.1007/978-1-4613-2435-5_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-9481-8
Online ISBN: 978-1-4613-2435-5
eBook Packages: Springer Book Archive