Rheologica Acta

, Volume 10, Issue 2, pp 200–207 | Cite as

Some investigations of melt fracture

  • J. L. den Otter
Originals

Summary

During melt fracture shear stresses and velocity profiles were measured in capillaries and slits. Different polymers show large differences in flow behaviour during melt fracture. The type of melt fracture can be predicted from the shape of the velocity profile in front of the entrance of the capillary or slit. Particular attention was paid to the behaviour of high-density polyethylene during instable flow accompanied by pressure and output variations.

Zusammenfassung

Scherspannungen und Geschwindigkeitsprofile wurden in Kapillaren und Schlitzen bei Schmelzbruch gemessen. Verschiedene Polymere zeigen bei Schmelzbruch große Unterschiede in ihrem Fließverhalten. Die Form des Geschwindigkeitsprofiles vor Eintritt in Kapillare oder Schlitz bestimmt den Typ des Schmelzbruches. Insbesondere wurde das Verhalten von Polyäthylenen hoher Dichte unter Bedingungen untersucht, bei denen instabiles Fließen, Druck- und Ausstoßschwankungen auftreten.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1).
    Spencer, R. S. andR. E. Dillon, J. Colloid Sci.4, 241 (1949).Google Scholar
  2. 2).
    Bagley, E. B., I. M. Cabbott andD. C. West, J. Appl. Phys.29, 109 (1958).Google Scholar
  3. 3).
    Tordella, J. P., Chapter 2 inF. R. Eirich, ed., Rheology (New York 1969).Google Scholar
  4. 4).
    den Otter, J. L., Plastics Polymers38, 155 (1970).Google Scholar
  5. 5).
    den Otter, J. L., J. L. S. Wales, J. Schijf, Rheol. Acta6, 205 (1967).Google Scholar
  6. 6).
    Schijf, J., Plastics31, 164 (1966).Google Scholar
  7. 7).
    McKelvey, J. M., Polymer Processing (New York 1962).Google Scholar
  8. 8).
    Benbow, J. J., R. N. Brown andE. R. Howells, Colloque Int. de Rhéologie (Paris 1960).Google Scholar
  9. 9).
    Benbow, J. J. andP. Lamb, SPE Trans.3, 1 (1963).Google Scholar
  10. 10).
    Mills, D. R., G. E. Moore andD. W. Pugh, SPE Trans.1, 40 (1961).Google Scholar
  11. 11).
    Ui, J., Y. Isimari, H. Morekami, N. Fukushima andY. Mori, SPE Trans.4, 295 (1964).Google Scholar
  12. 12).
    Lupton, J. M. andJ. W. Regester, Polymer Eng. Sci.5, 235 (1965).Google Scholar
  13. 13).
    Clegg, P. L., British Plastics96 (1966).Google Scholar
  14. 14).
    Cogswell, F. N., P. Lamb, Trans. J. Plastics Inst.35, 809 (1967).Google Scholar
  15. 15).
    Dennison, M. T., Trans. J. Plastics Inst.35, 803 (1967).Google Scholar
  16. 16).
    Metzger, A. P., andC. W. Hamilton SPE Trans.4, 107 (1964).Google Scholar
  17. 17).
    Metzger, A. P., C. W. Hamilton andE. H. Merz, SPE Trans.3, 21 (1963).Google Scholar
  18. 18).
    Myerholtz, R. W., J. Appl. Polymer Sci.11, 687 (1967).Google Scholar
  19. 19).
    Vinogradov, G. V. andL. I. Ivanova, Rheol. Acta7, 243 (1968).Google Scholar
  20. 20).
    Vinogradov, G. V. andI. M. Belkin, J. Polymer Sci., A3, 917 (1965).Google Scholar
  21. 21).
    Pollett, W. F. O., p. 85 inHarrison, ed., Proceed. second intern. Congress rheology, Oxford 1953.Google Scholar
  22. 22).
    Wales, J. L. S., personal communication.Google Scholar
  23. 23).
    den Otter, J. L., to be published.Google Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag 1971

Authors and Affiliations

  • J. L. den Otter
    • 1
  1. 1.Centraal Laboratorium TNODelftNetherlands

Personalised recommendations