Abstract
An extensional vibrorheometer and a system for its automatic control have been developed. The instrument which has been created makes it possible to investigate liquid polymers under conditions of extensional deformation under a regime where\(\mathop \varepsilon \limits^.\)=const. Such investigations may be carried out over a wide range of rates and deformations with the simultaneous superimposition on the extensional flow of periodic deformations covering a range of frequencies exceeding three decimal orders.
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Literature cited
A. S. Lodge, Elastic Liquids, Academic Press, London—New York (1964).
F. Röthemeyer, Elastische Effekte bei der Extrusion von Kunststoffschmelzen, Dissertation, Stuttgart (1970).
R. B. Bird and T. W. Spriggs, "Elongational viscosity of viscoelastic fluids," Phys. Fluids,8, No. 7, 1390–1392 (1965).
A. Ya. Malkin, V. V. Goncharenko, and V. F. Shumskii, "Comparison of the flow of viscoelastic media under shear and under elongation," Mekh. Polim., No. 2, 328–332 (1974).
J. A. Spearot and A. B. Metzner, "Isothermal spinning of molten polyethylenes," Trans. Soc. Rheol.,16, No. 3, 495–518 (1972).
V. D. Fikhman, B. V. Radushkevich, and G. V. Vinogradov, "Rheological properties of polymers under elongation at a constant rate of deformation and at a constant rate of elongation," in: Progress in Polymer Rheology [in Russian], Moscow (1970), pp. 9–24.
F. N. Cogswell, "Tensile deformation in molten polymers," Rheol. Acta,8, No. 2, 187–194 (1969).
J. M. Dealy, "Extensional flow of non-Newtonian fluids. A Review," Polym. Eng. Sci.,11, No. 6, 433–444 (1971).
B. V. Radushkevich, V. D. Fikhman, and G. V. Vinogradov, "The viscous and relaxation properties of polymers during the process of drawing," in: Progress in Polymer Rheology [in Russian], Moscow (1970), pp. 24–39.
H. Markowitz, "Small deformatios superimposed on steady viscometric flows," in: Proceedings of the Fifth International Congress on Rheology, Kyoto (1969), pp. 499–510.
L. A. Faitel'son, I. P. Briedis, and V. V. Leitland, "An extensional vibrorheometer," USSR Author's Certificate No. 307313; Otk. Izobret., Prom-st', Obrazts., Tovarn. Znaki, No. 20 (1971).
Simmons, The dynamic properties of solutions of polyisobutylene under a determined shear flow," in: The Physical Chemistry of Polymers Abroad [in Russian], Moscow (1970), pp. 206–235.
J. Meisner, "Rheometer zur Untersuchung der deformationsmechanischen Eigenschaften von Kunststoffschmelzen unter definierten Zugbeanspruchung," Rheol. Acta,8, 78–88 (1969).
L. T. Kuzin, Calculations and Planning of Discrete Systems of Control, Moscow (1962).
Additional information
Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 2, pp. 336–343, March–April, 1976.
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Leitland, V.V., Briedis, I.P., Adavich, P.N. et al. An extensional vibrorheometer for viscofluid polymers. Polymer Mechanics 12, 291–298 (1976). https://doi.org/10.1007/BF00856468
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DOI: https://doi.org/10.1007/BF00856468