Home Melt Fracture of Linear PE
Article
Licensed
Unlicensed Requires Authentication

Melt Fracture of Linear PE

A Critical Study in Terms of Their Extensional Behaviour
  • E. B. Muliawan , S. G. Hatzikiriakos and M. Sentmanat
Published/Copyright: April 30, 2013
Become an author with De Gruyter Brill

Abstract

In this paper we studied the melt fracture behaviour in capillary flow of a number of polyethylenes produced by various technologies. The critical shear rates for the onset of both sharkskin and gross melt fractures were found to correlate with the high-rate extensional flow behaviour of the polymers. These findings were found to mechanistically support the generally accepted observations of melt fracture occurring at the exit (sharkskin) and entrance (gross) regions of the capillary die. In addition, it was found that boron nitride (BN) behaves as an energy dissipater that suppresses the rapid increase of extensional stress associated with gross melt fracture. This enables BN to act as an effective processing aid in postponing gross melt fracture in the extrusion of polyethylenes.


Mail address: S. G. Hatzikiriakos, Dep. of Chem. and Bio. Eng., University of British Columbia, 2216 Main Mall, Vancouver, B.C., Canada VGT 1Z4 E-mail:

References

1 Achilleos, E. C., Georgiou, G., Hatzikiriakos, S. G.: J. Vinyl and Additive Technology8, p. 7 (2002).10.1002/vnl.10340Search in Google Scholar

2 Ramamurthy, A. V.: J. Rheol.30 (2), p. 337 (1986).10.1122/1.549852Search in Google Scholar

3 Migler, K. B., in: Polymer Processing Instabilities: Understanding and Control. Hatzikiriakos, S. G., Migler, K. (Eds.), Marcel Dekker, New York (2004).10.1201/9781420030686Search in Google Scholar

4 Georgiou, G., in: Polymer Processing Instabilities: Understanding and Control. Hatzikiriakos, S. G., Migler, K. (Eds.), Marcel Dekker, New York (2004).Search in Google Scholar

5 Dealy, J. M., Kim, S., in: Polymer Processing Instabilities: Understanding and Control. Hatzikiriakos, S. G., Migler, K. (Eds.), Marcel Dekker, New York (2004).Search in Google Scholar

6 Howells, E. R., Benbow, J. J.: Trans. Plast. Inst.30, p. 240 (1962).Search in Google Scholar

7 Cogswell, F. N.: J. Non-Newtonian Fluid Mech.2, p. 37 (1977).10.1016/0377-0257(77)80031-1Search in Google Scholar

8 Migler, K., Lavallee, C., Dillon, M., Woods, S., Gettinger, C.: J. Rheol.45 (2), p. 565 (2001).10.1122/1.1349136Search in Google Scholar

9 Bergem, N.: Proceeding 8th Int. Congr. Rheol. Gothenberg, p. 50 (1976).Search in Google Scholar

10 Piau, J. M., El Kissi, N., Trenblay, B.: J. Non-Newtonian Fluid Mech.30, p. 197 (1988).10.1016/0377-0257(88)85025-0Search in Google Scholar

11 Vinogradov, G. V., Malkin, A. Y.: Rheology of Polymers. Mir, Moscow, Springer, Berlin (1980).10.1007/978-3-642-52204-8Search in Google Scholar

12 Tremblay, B.: J. Rheol.35 (6), p. 985 (1991).10.1122/1.550177Search in Google Scholar

13 Kurtz, S. J.: Proceeding XIth Int. Congr. on Rheology, Brussels, Belgium, in: Theoretical and Applied Rheology. MoldenaersP., KeuningsR. (Eds.), Elsevier Science Publishers, Amsterdam (1992).Search in Google Scholar

14 Moynihan, R. H., Baird, D. G., Ramanathan, R.: J. Non-Newtonian Fluid Mech.36, p. 255 (1990).10.1016/0377-0257(90)85012-NSearch in Google Scholar

15 Piau, J. M., El Kissi, N., Trenblay, B.: J. Non-Newtonian Fluid Mech.34, p. 145 (1990).10.1016/0377-0257(90)80016-SSearch in Google Scholar

16 Kazatchkov, I. B., Yip, F., Hatzikiriakos, S. G.: Rheol. Acta39, p. 583 (2000).10.1007/s003970000113Search in Google Scholar

17 Son, Y., Migler, K. B.: SPE ANTEC Tech. Papers60, p. 3742 (2002).Search in Google Scholar

18 Tordella, J. P., in: Rheology, Eirich, F. R. (Ed.), Academic Press, New York (1969).Search in Google Scholar

19 Cogswell, F. N.: Polym. Eng. Sci.12, p. 64 (1972).10.1002/pen.760120111Search in Google Scholar

20 Kim, S., Dealy, J. M.: Polym. Eng. Sci.42, p. 482 (2002).10.1002/pen.10965Search in Google Scholar

21 Kim, S., Dealy, J. M.: Polym. Eng. Sci.42, p. 485 (2002).10.1002/pen.10966Search in Google Scholar

22 Sentmanat, M. L.: SER-HV-A01 Universal Testing Platform Instrument Manual. Xpansion Instruments, p. 1–71–8 (2003).Search in Google Scholar

23 Sentmanat, M. L.: SPE ANTEC Tech. Papers61, p. 992 (2003).Search in Google Scholar

24 Münstedt, H.: J. Rheol.24 (6), p. 847 (1980).10.1122/1.549587Search in Google Scholar

25 Sentmanat, M. L., Muliawan, E. B., Hatzikiriakos, S. G.: Rheol. Acta in press (2004).Search in Google Scholar

26 Sentmanat, M. L., Hatzikiriakos, S. G.: Rheol. Acta in press (2004).Search in Google Scholar

27 Doerpinghaus, P. J., Baird, D. G.: Rheol. Acta42, p. 544 (2003).10.1007/s00397-003-0309-8Search in Google Scholar

28 Hatzikiriakos, S. G., in: Polymer Processing Instabilities: Understanding and Control, Hatzikiriakos, S. G., Migler, K. (Eds.), Marcel Dekker, New York (2004).10.1201/9781420030686Search in Google Scholar

Received: 2004-10-12
Accepted: 2005-1-4
Published Online: 2013-04-30
Published in Print: 2005-03-01

© 2005, Carl Hanser Verlag, Munich

Downloaded on 9.9.2025 from https://www.degruyterbrill.com/document/doi/10.3139/217.1862/pdf
Scroll to top button