Sharkskin instability in extrusion

Polymer Processing Instabilities: Control and Understanding

Volumn , Issue , 2004, Pages 121-159

  Migler, Kalman B ^a  

^a NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY   (United States)

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[No Author keywords available]

Indexed keywords

EID: 85038622673     PISSN: None     EISSN: None     Source Type: Book    
DOI: None     Document Type: Chapter

References (55)

1. Denn, M.M. Extrusion instabilities and wall slip. Annu. Rev. Fluid Mech. 2001 33, 265-287.
2. Denn, M.M. Issues in viscoelastic fluid-mechanics. Annu. Rev. Fluid Mech. 1990, 22, 13-34.
3. Larson, R.G. Instabilities in viscoelastic flows. Rheol. Acta 1992, 31, 213-263.
4. Piau, J.M.; Agassant, J.F. Rheology for Polymer Melt Processing; Elsevier: Amsterdam, 1996.
5. Macosko, C.W. Rheology Principles, Measurements, and Applications; VCH: New York, 1994.
6. Morrison, F.A. Understanding Rheology; Oxford University Press: New York, 2001.
7. Migler, K.B.; Son, Y.; Qiao, F.; Flynn, K. Extensional deformation, cohesive failure, and boundary conditions during sharkskin melt fracture. J. Rheol. 2001 46, 383-400.
8. Yamaguchi, M.; Miyata, H.; Tan, V.; Gogos, C.G. Relation between molecular structure and flow instability for ethylene/alpha-olefin copolymers. Polymer 2002, 43, 5249-5255.
9. El Kissi, N.; Piau, J.M. Adhesion of linear low-density polyethylene for flow regimes with sharkskin. J. Rheol. 1994, 38, 1447-1463.
10. El Kissi, N.; Leger, L.; Piau, J.M.; Mezghani, A. Effect of surface-properties on polymer melt slip and extrusion defects. J. Non-Newton. Fluid Mech. 1994, 52, 249-261.
11. El Kissi, N.; Piau, J.M.; Toussaint, F. Sharkskin and cracking of polymer melt extrudates. J. Non-Newton. Fluid Mech. 1997, 68, 271-290.
12. Piau, J.M.; El Kissi, N.; Mezghani, A. Slip-flow of polybutadiene through fluorinated dies. J. Non-Newton. Fluid Mech. 1995, 59, 11-30.
13. Venet, C.; Vergnes, B. Experimental characterization of sharkskin in poly- ethylenes. J. Rheol. 1997, 41, 873-892.
14. Inn, Y.W.; Fischer, R.J.; Shaw, M.T. Visual observation of development of sharkskin melt fracture in polybutadiene extrusion. Rheol. Acta 1998, 37, 573-582.
15. Tzoganakis, C.; Price, B.C.; Hatzikiriakos, S.G. Fractal analysis of the sharkskin phenomenon in polymer melt extrusion. J. Rheol. 1993, 37, 355-366.
16. Denn, M.M. Extrusion instabilities and wall slip. Annu. Rev. Fluid Mech. 2001, 33, 265-297.
17. Shaw, M.T.; Wang, L. Sharkskin melt fracture: recent findings using model geometries. International Conference on Rheology, 2000.
18. Kalika, D.S.; Denn, M.M. Wall slip and extrudate distortion in linear low- density polyethylene. J. Rheol. 1987, 31, 815-834.
19. Ramamurthy, A.V. Wall slip in viscous fluids and influence of materials of construction. J. Rheol. 1986, 30, 337–357.
20. Kalika, D.S.; Denn, M.M. Wall slip and extrudate distortion in linear low- density polyethylene. J. Rheol. 1987, 31, 815-834.
21. Wang, S.Q.; Drda, P.A.; Inn, Y.W. Exploring molecular origins of sharkskin, partial slip, and slope change in flow curves of linear low density polyethylene. J. Rheol. 1996, 40, 875-898.
22. Migler, K.B.; Lavallee, C.; Dillon, M.P.; Woods, S.S.; Gettinger, C.L. Visualizing the elimination of sharkskin through fluoropolymer additives: coating and polymer-polymer slippage. J. Rheol. 2001, 45, 565-581.
23. Legrand, F.; Piau, J.M. Spatially resolved stress birefringence and flow visualization in the flow instabilities of a polydimethylsiloxane extruded through a slit die. J. Non-Newton. Fluid Mech. 1998, 77, 123-150.
24. Inn, Y.W.; Wang, L.S.; Shaw, M.T. Efforts to find stick-slip flow in the land of a die under sharkskin melt fracture conditions: polybutadiene. Macromol. Symp. 2000, 158, 65-75.
25. Merten, A.; Seidel, C.; Munstedt, H. Comparison of the sharkskin defect of two linear polyethylenes and the influence of a slip additive as investigated by laser- doppler velocimetry. Abstract of the First Annual European Conference on Rheology, 2003.
26. Hatzikiriakos, S.G. The onset of wall slip and sharkskin melt fracture in capillary-flow. Polym. Eng. Sci. 1994, 34, 1441-1449.
27. Vinogradov, G.V.; Insarova, N.I.; Boiko, B.B.; Borisenkova, E.K. Critical regimes of shear in linear polymers. Polym. Eng. Sci. 1972, 12, 323-334.
28. Barone, J.R.; Plucktaveesak, N.; Wang, S.Q. Interfacial molecular instability mechanism for sharkskin phenomenon in capillary extrusion of linear polyethylenes. J. Rheol. 1998, 42, 813-832.
29. Wise, G.M.; Denn, M.M.; Bell, A.T. Surface mobility and slip of polybutadiene melts in shear flow. J. Rheol. 2000, 44, 549-567.
30. Ghanta, V.G.; Riise, B.L.; Denn, M.M. Disappearance of extrusion instabilities in brass capillary dies. J. Rheol. 1999, 43, 435-442.
31. Howells, E.R.; Benbow, J. Flow defects in polymer melts. Trans. Plastics Inst. 1962, 30, 240-253.
32. Fujiyama, M.; Inata, H. Melt fracture behavior of polypropylene-type resins with narrow molecular weight distribution. 1. Temperature dependence. J. Appl. Polym. Sci. 2002, 84, 2111-2119.
33. Fujiyama, M.; Inata, H. Melt fracture behavior of polypropylene-type resins with narrow molecular weight distribution. II. Suppression of sharkskin by addition of adhesive resins. J. Appl. Polym. Sci. 2002, 84, 2120-2127.
34. Moynihan, R.H.; Baird, D.G.; Ramanathan, R. Additional observations on the surface melt fracture-behavior of linear low-density polyethylene. J. NonNewton. Fluid Mech. 1990, 36, 255-263.
35. Rutgers, R.P.G.; Mackley, M.R. The effect of channel geometry and wall boundary conditions on the formation of extrusion surface instabilities for LLDPE. J. Non-Newton. Fluid Mech. 2001, 98, 185-199.
36. Deeprasertkul, C.; Rosenblatt, C.; Wang, S.Q. Molecular character of sharkskin phenomenon in metallocene linear low density polyethylenes. Macromol. Chem. Phys. 1998, 199, 2113-2118.
37. Wang, S.Q. Molecular transitions and dynamics at polymer/wall interfaces: origins of flow instabilities and wall slip. Adv. Polym. Sci. 1999, 138, 227-275.
38. Kolnaar, J.W.H.; Keller, A. A singularity in the melt flow of polyethylene with wider implications for polymer melt flow rheology. J. Non-Newton. Fluid Mech. 1997, 69, 71-98.
39. Pudjijanto, S.; Denn, M.M. A stable island in the slip-stick region of linear low-density polyethylene. J. Rheol. 1994, 38, 1735-1744.
40. Perez-Gonzalez, J.; Denn, M.M. Flow enhancement in the continuous extrusion of linear low-density polyethylene. Ind. Eng. Chem. Res. 2001, 40, 4309-4316.
41. Santamaria, A.; Fernandez, M.; Sanz, E.; Lafuente, P.; Munoz-Escalona, A. Postponing sharkskin of metallocene polyethylenes at low temperatures: the effect of molecular parameters. Polymer 2003, 44, 2473-2480.
42. Kazatchkov, I.B.; Bohnet, N.; Goyal, S.K.; Hatzikiriakos, S.G. Influence of molecular structure on the rheological and processing behavior of polyethylene resins. Polym. Eng. Sci. 1999, 39, 804-815.
43. Dhori, P.K.; Jeyaseelan, R.S.; Giacomin, A.J.; Slattery, J.C. Common line motion. 3. Implications in polymer extrusion. J. Non-Newton. Fluid Mech 1997 71, 231-243.
44. Barone, J.R.; Wang, S.Q. Rheo-optical observations of sharkskin formation in slit-die extrusion. J. Rheol. 2001, 45, 49-60.
45. Barone, J.; Wang, S.Q. Flow birefringence study of sharkskin and stress relaxation in polybutadiene melts. Rheol. Acta 1999, 38, 404-414.
46. Mackley, M.R.; Rutgers, R.P.G.; Gilbert, D.G. Surface instabilities during the extrusion of linear low density polyethylene. J. Non-Newton. Fluid Mech. 1998 76, 281-297.
47. Rutgers, R.; Mackley, M. The correlation of experimental surface extrusion instabilities with numerically predicted exit surface stress concentrations and melt strength for linear low density polyethylene. J. Rheol. 2000, 44, 1319-1334.
48. Venet, C.; Vergnes, B. Stress distribution around capillary die exit: an interpretation of the onset of sharkskin defect. J. Non-Newton. Fluid Mech. 2000, 93, 117-132.
49. Cogswell, F.N. Stretching flow instabilities at the exits of extrusion dies. J. NonNewton. Fluid Mech. 1977, 2, 37-47.
50. Mizunuma, H.; Takagi, H. Cyclic generation of wall slip at the exit of plane couette flow. J. Rheol. 2003, 47, 737-757.
51. Tremblay, B. Sharkskin defects of polymer melts—the role of cohesion and adhesion. J. Rheol. 1991, 35, 985-998.
52. Son, Y.; Migler, K.B. Cavitation of polyethylene during extrusion processing instabilities. J. Polym. Sci. B Polym. Phys. 2002, 40, 2791-2799.
53. Black, W.B.; Graham, M.D. Wall-slip and polymer-melt flow instability. Phys. Rev. Lett. 1996, 77, 956-959.
54. Joseph, D.D. Steep wave fronts on extrudates of polymer melts and solutions: lubrication layers and boundary lubrication. J. Non-Newton. Fluid Mech. 1997, 70, 187-203.
55. Cogswell, F.N.; Barone, J.R.; Plucktaveesak, N.; Wang, S.Q. Letter to the editor: the mystery of the mechanism of sharkskin. J. Rheol. 1999, 43, 245-252.