Abstract
This paper presents and reviews findings in relation to three key areas where polymer processing instabilities occur. The paper also describes methods that can be utilised to reduce, or eliminate, the particular instability. Using previously published results in each of the three areas and work presented in the paper, physical insight into the three mechanisms is reviewed and compared. Extrusion instabilities develop with increasing extrusion rate and the onset of extrusion instability is often a key limitation to the maximum output of an extrusion line. The sharkskin instability is an exit effect instability that can be modified by changing exit geometries and eliminated using certain additives. The stick-spurt instability is intimately related to wall boundary conditions which can be influenced by certain wall and polymer formulations. Finally volume instabilities occur in the entry region of a die and result in a highly distorted product. The instabilities are related to viscoelastic effects within the die and can be minimised by appropriate die and polymer modification. The paper provides sufficient experimental background to identify the key physical aspects associated with each of the instabilities and this in turn provides insight into the different way each instability occurs and how they can be minimised.
References
1 1 Petrie, J. C. S., Denn, M. M.: A.I.Ch.E. J. 22, p. 209 (1976)10.1002/aic.690220202Search in Google Scholar
2 2 Denn, M. M.: Annu. Rev. Fluid Mech. 22, p. 13 (1990)10.1146/annurev.fl.22.010190.000305Search in Google Scholar
3 3 Larson, R. G.: Rheol. Acta, 31, p. 213 (1992)10.1007/BF00366504Search in Google Scholar
4 4 Wales, J. L. S.: The application of flow birefringence to rheological studies of polymer melts, Delft University Press, Delft (1976)10.1007/978-94-010-1556-1Search in Google Scholar
5 5 Arda, R. D.: PhD Thesis, University of Cambridge (2003)Search in Google Scholar
6 6 Venet, C., Vergnes, B.: J. Rheol. 41, p. 873 (1997)10.1122/1.550837Search in Google Scholar
7 7 Arda, R. D., Mackley, M. R.: J. Non-Newt. Fluid Mech. 126, p. 47 (2005)10.1016/j.jnnfm.2004.12.005Search in Google Scholar
8 8 Keunings, R., in: Fundamentals of Computer Modeling for Polymer Processing. TuckerIII, C. L. (Ed.), Hanser, Munich (1989)Search in Google Scholar
9 9 Denn, M. M., in: Theoretical and Applied Rheology. Moldenaers, P., Keunings, R. (Eds.) Proc. XIth Int. Cong. Rheology, Elsevier, New York (1992)Search in Google Scholar
10 10 Cogswell, F. N.: J. Non-Newt. Fluid Mech. 2, p. 37 (1977)10.1016/0377-0257(77)80031-1Search in Google Scholar
11 11 El Kissi, N., Piau, J. M.: J. Rheol. 38, p. 1447 (1994)10.1122/1.550552Search in Google Scholar
12 12 Rutgers, R. P. G., Mackley, M. R.: J. Rheol. 44, p. 1319 (2000)10.1122/1.1319176Search in Google Scholar
13 13 Venet, C., Vergnes, B.: J. Non-Newt. Fluid Mech. 93, p. 117 (2000)10.1016/S0377-0257(00)00105-1Search in Google Scholar
14 14 Allal, A., Lavernhe, A., Vergnes, B., Marin, G.: J. Non-Newt. Fluid Mech. 134, p. 127 (2006)10.1016/j.jnnfm.2005.12.010Search in Google Scholar
15 15 Wang, S. Q., Drda, P. A., Inn, Y. W.: J. Rheol. 40, p. 875 (1996)10.1122/1.550766Search in Google Scholar
16 16 Wang, S. Q., Drda, P. A.: Macromol. Chem. Phys. 198, p. 673 (1997)10.1002/macp.1997.021980302Search in Google Scholar
17 17 Wang, S. Q., Drda, P. A.: Rheol. Acta36, p. 128 (1997)10.1007/BF00366818Search in Google Scholar
18 18 Molenaar, J., Koopmans, R. J., den Doelder, C. F. J.: Phys. Rev. E. 58 (4), p. 4683 (1998)10.1103/PhysRevE.58.4683Search in Google Scholar
19 19 Merten, A., Schwetz, M., Münstedt, H.: Int. J. Appl. Mech. Eng. 8, p. 283 (2003)Search in Google Scholar
20 20 Merten, A.: Dissertation, Universität Erlangen–Nürnberg, (2005)Search in Google Scholar
21 21 Merten, A., Schwetz, M., Münstedt, H.: Proceedings of the 6th European Conference on Rheology, p.147 (2002)Search in Google Scholar
22 22 Kurtz, S. J.: Advances in Rheology, IX Intl. Congress on Rheology, Mexico, p. 399 (1984)Search in Google Scholar
23 23 Piau, J. M., El Kissi, N., Toussaint, F., Mezghani, A.: Rheol. Acta34, p. 40 (1995)10.1007/BF00396053Search in Google Scholar
24 24 Stewart, C. W.: J. Rheol. 37, p. 499 (1993)10.1122/1.550456Search in Google Scholar
25 25 Ghanta, V. G., Riise, B. L., Denn, M. M.: J. Rheol. 43, p. 435 (1999)10.1122/1.550988Search in Google Scholar
26 26 Kulikov, O., Hornung, K.: J. Non-Newt. Fluid Mech. 124, p. 103 (2004)10.1016/j.jnnfm.2004.07.009Search in Google Scholar
27 27 Yip, F., Hatzikiriakos, S. G., Clere, T. M.: J. Vinyl Add. Tech. 6, p. 113 (2000)10.1002/vnl.10234Search in Google Scholar
28 28 Migler, K. B., Lavallee, C., Dillon, M. P., Woods, S. S., Gettinger, C. L.: J. Rheol. 45, p. 565 (2001)10.1122/1.1349136Search in Google Scholar
29 29 Arda, D. R., Mackley, M. R.: Rheol. Acta44, p. 352 (2005)10.1007/s00397-004-0416-1Search in Google Scholar
30 30 Bagley, E. B., Cabot, I. M., West, D. C.: J. Appl. Phys. 29, p. 109 (1958)10.1063/1.1722930Search in Google Scholar
31 31 Bagley, E. B., Birks, A. M.: J. Appl. Phys. 31, p. 556 (1960)10.1063/1.1735627Search in Google Scholar
32 32 El Kissi, N., Piau, J. M.: J. Non-Newt. Fluid Mech. 37, p. 673 (1990)10.1016/0377-0257(90)80004-JSearch in Google Scholar
33 33 Kalika, D. S., Denn, M. M.: J. Rheol. 31, p. 815 (1987)10.1122/1.549942Search in Google Scholar
34 34 Hatzikiriakos, S. G., Dealy, J. M.: J. Rheol., 36, p. 845 (1992)10.1122/1.550320Search in Google Scholar
35 35 Durand, V., Vergnes, B., Agassant, J. F., Benoit, E., Koopmans, R. J.: J. Rheol. 40, p. 383 (1996)10.1122/1.550749Search in Google Scholar
36 36 den Doelder, C. F. J., Koopmans, R. J., Molenaar, J.: J. Non-Newt. Fluid Mech. 79, p. 503 (1998)10.1016/S0377-0257(98)00117-7Search in Google Scholar
37 37 Münstedt, H., Schmidt, M., Wassner, E.: J. Rheol. 44, p. 245 (2000)10.1122/1.551092Search in Google Scholar
38 38 Robert, L.: PhD Thesis, Université de Nice Sophia-Antipolis (2001)Search in Google Scholar
39 39 Robert, L., Vergnes, B., Demay, Y.: J. Non-Newt. Fluid Mech. 112, p. 27 (2003)10.1016/S0377-0257(03)00059-4Search in Google Scholar
40 40 Robert, L., Demay, Y., Vergnes, B.: Rheol. Acta43, p. 89 (2004)10.1007/s00397-003-0323-xSearch in Google Scholar
41 41 Molenaar, J., Koopmans, R. J.: J. Rheol. 38, p. 99 (1994)10.1122/1.550603Search in Google Scholar
42 42 Adewale, K. P., Leonov, A. I.: Rheol. Acta36, p. 110 (1997)10.1007/BF00366817Search in Google Scholar
43 43 Georgiou, G. C., Crochet, M. S.: J. Rheol. 38, p. 639 (1994)10.1122/1.550479Search in Google Scholar
44 44 Dubbeldam, J. L. A., Molenaar, J.: J. Non-Newt. Fluid Mech. 112, p. 217 (2003)10.1016/S0377-0257(03)00101-0Search in Google Scholar
45 45 Mehtar, V., Archer, L. A.: Macromol. 31, p. 8607 (1998)10.1021/ma980163wSearch in Google Scholar
46 46 Yarin, A. L., Graham, M. D.: J. Rheol. 42, p. 1491 (1998)10.1122/1.550898Search in Google Scholar
47 47 Tchesnokov, M. A., Molenaar, J., Slot, J. J. M.: J. Non-Newt. Fluid Mech. 126, p. 71 (2005)10.1016/j.jnnfm.2004.02.013Search in Google Scholar
48 48 Done, D. S., Baird, D. G., Average, A. E.: Chem. Eng. Comm.21, p. 293 (1998)10.1080/00986448308940293Search in Google Scholar
49 49 Piau, J. M., Nigen, S., El Kissi, N.: J. Non-Newt. Fluid Mech. 91, p. 37 (2000)10.1016/S0377-0257(99)00083-XSearch in Google Scholar
50 50 Goutille, Y., Majesté, J. C., Tassin, J. F., Guillet, J.: J. Non-Newt. Fluid Mech. 111, p. 175 (2003)10.1016/S0377-0257(03)00054-5Search in Google Scholar
51 51 Ramamurthy, A. V.: J. Rheol. 30, p. 337 (1986)10.1122/1.549852Search in Google Scholar
52 52 Koran, F., Dealy, J.: J. Rheol. 43, p. 1291 (1999)10.1122/1.551025Search in Google Scholar
53 53 Combeaud, C., Demay, Y., Vergnes, B.: Rhéologie4, p. 50 (2003)Search in Google Scholar
54 54 Tordella, J. P.: J. Appl. Phys. 27, p. 454 (1956)10.1063/1.1722401Search in Google Scholar
55 55 Benbow, J. J., Lamb, P.: S.P.E. Trans. 3, p. 7 (1963)10.1002/pen.760030104Search in Google Scholar
56 56 Piau, J. M., El Kissi, N., Tremblay, B.: J. Non-Newt. Fluid Mech. 34, p. 145 (1990)10.1016/0377-0257(90)80016-SSearch in Google Scholar
57 57 Ballenger, T. F., Chen, I. J., Crowder, J. W., Hagler, G. E., Bogue, D. C., White, J. L.: Trans. Soc. Rheol. 15, p. 195 (1971)10.1122/1.549207Search in Google Scholar
58 58 Muller, R., Vergnes, B., in: Rheology for Polymer Processing. Piau, J. M., Agassant, J. F. (Eds.) Elsevier, New York (1996)Search in Google Scholar
59 59 Tordella, J. P.: Trans. Soc. Rheol., 1 pp.203 (1957)10.1122/1.548816Search in Google Scholar
60 60 Oyanagi, Y.: Appl. Polym. Symp. 20 p. 123 (1973)Search in Google Scholar
61 61 Nakamura, K., Ituaki, S., Nishimura, T., Horikawa, A.: J. Text. Eng. 36, p. 49 (1987)10.4188/jte1955.36.49Search in Google Scholar
62 62 Rothstein, J. R., McKinley, G. H.: J. Non-Newt. Fluid Mech. 98, p. 33 (2001)10.1016/S0377-0257(01)00094-5Search in Google Scholar
63 63 Nigen, S., El Kissi, N., Piau, J. M., Sadun, S.: J. Non-Newt. Fluid Mech. 112, p. 177 (2003)10.1016/S0377-0257(03)00097-1Search in Google Scholar
64 64 Kim, S., Dealy, J. M.: Polym. Eng. Sci. 42, p. 482 (2002)10.1002/pen.10965Search in Google Scholar
65 65 Kim, S., Dealy, J. M.: Polym. Eng. Sci. 42, p. 495 (2002)10.1002/pen.10966Search in Google Scholar
66 66 Den Otter, J. L.: Plast. Polym. 38, p. 155 (1970)Search in Google Scholar
67 67 Tordella, J. P., in: Rheology, Eidrich, F. R. (Ed.). Academic Press, New York (1969)Search in Google Scholar
68 68 Combeaud, C.: PhD Thesis, Ecole des Mines de Paris (2004)Search in Google Scholar
69 69 Bergem, N.: Proceeding of 7th Congress in Rheology, Göteborg, p.50 (1976)Search in Google Scholar
70 70 Baik, J. J., Tzoganakis, C.: Polym. Eng. Sci. 38, p. 274 (1998)10.1002/pen.10188Search in Google Scholar
71 71 Agassant, J. F., Avenas, P., Sergent, J. Ph., Vergnes, B., Vincent, M.: La mise en forme des matières plastiques, Lavoisier, Tec et Doc, Paris (1996)Search in Google Scholar
72 72 Combeaud, C., Demay, Y., Vergnes, B.: J. Non-Newt. Fluid Mech. 21, p. 175 (2004)10.1016/j.jnnfm.2004.06.007Search in Google Scholar
73 73 Combeaud, C., Vergnes, B., Merten, A., Münstedt, H.: submitted to J. Rheol. (2006)Search in Google Scholar
74 74 Spencer, R. S., Dillon, R. E.: J. Colloid Sci. 3, p. 163 (1948)10.1016/0095-8522(48)90066-XSearch in Google Scholar
75 75 Bagley, E. B., Schreiber, H. P.: Trans. Soc. Rheol. 5, p. 341 (1961)10.1122/1.548904Search in Google Scholar
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