Abstract
The deformation zone of fractured nylon-6/ethylene-propylene rubber specimens was studied using scanning electron microscopy (SEM). In this deformation zone three distinct layers were observed. In the main part of the stress-whitened zone only cavitation was visible. From 150-5 μm below the fracture surface, massive plastic deformation was observed. Directly under the fracture surface there was a layer about 3–5 μm thick where no cavitation or deformation was visible. This zone without cavitation was only visible when the specimen was fractured at high deformation rates. It is proposed that this top layer consists of material which was molten during fast crack propagation under adiabatic conditions. This hypothesis has been confirmed by model calculations and experiments. When the deformation rate is very high (greater than the impact velocities) plastic deformation is not homogeneous throughout the deformation zone, but confined to layers.
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References
C. B. Bucknall, in “Toughened Plastics” (Applied Science, London, 1977).
S. Cimmino, F. Coppola, L. D'Orazio, R. Greco, G. Maglio, M. Malinconico, C. Mancarella, E. Martuscelli and G. Ragosta, Polymer 27 (1986) 1874.
F. Ramsteiner and W. Heckmann, Polym. Commun. 26 (1985) 199.
R. J. Gaymans, R. J. M. Borggreve and A. J. Oostenbrink, Makromol. Chem. Makromol. Symp. 38 (1990) 125.
F. Speroni, E. Castoldi, P. Fabbri and T. Casiraghi, J. Mater. Sci. 24 (1989) 2165.
A. J. Oostenbrink, K. Dijkstra, A. Van Der Wal and R. J. Gaymans, P.R.I. Churchill Conference on Deformation and Fracture of Polymers, Cambridge, April 1990, Preprints Paper 50.
J. W. Boode, A. E. H. Gaalman, A. J. Pijpers and R. J. M. Borggreve, poster presented at the Prague Macromolecular Meeting IUPAC Symposium “Mechansims of Polymer strength and Toughness”, Pragve, July 1990.
Y. K. Godovsky, in “Thermophysical Properties of Polymers” (Springer, Berlin, 1992).
Y. K. Godovsky, V. S. Papkov, A. I. Slutsker, E. E. Tomashevskii and G. L. Slonimskii, Solid State Phys. 13 (1971) 2289.
R. P. Kambour and R. E. Barker, J. Polym Sci. A-2 4 (1966) 359.
N. Levy and J. R. Rice, in “Physics of Strength and Plasticity”,edited by A. S. Argon (Massachusetts Institute of Technology Press, Cambridge, MA, 1969) p. 252, ref 8.
T. Fukui, Y. Kikuchi and T. Inoue, Polymer 32 (1991) 2367.
A. R. Postema, P. Smith and A. D. English, Polym. Commun. 31 (1990) 444.
K. Dijkstra, A. Van Der Wal and R. J. Gaymans, J. Mater. Sci., submitted.
K. Dijkstra, H. H. Wevers and R. J. Gaymans, Polymer 35 (1994) 323.
H. S. Carslaw and J. C. Jaeger, in “Conduction of Heat in Solids”, 2nd Edn (Oxford University Press, 1969 p. 254, ref 8.
K. Dijkstra, J. Ter Laak and R. J. Gaymans, Polymer 35 (1994) 315.
K. Dijkstra and G. H. Ten Bolscher, J. Mater. Sci., in Press.
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Dijkstra, K., Gaymans, R.J. Nylon-6/rubber blends. JOURNAL OF MATERIALS SCIENCE 29, 3231–3238 (1994). https://doi.org/10.1007/BF00356668
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DOI: https://doi.org/10.1007/BF00356668