Wall slip and extrudate instability of 4-arm star polybutadienes in capillary flow

Rheologica Acta

Volumn 43, Issue 4, 2004, Pages 373-382

  Zhu, Zhiyong ^a  

^a The University of Akron   (United States)

Author keywords

Extrusion instability; Flow split; Polybutadiene; Sharkskin; Star polymer

Indexed keywords

CAPILLARY; EXTRUSION; FLUID FLOW; INSTABILITY; SLIP;

EID: 4043096859     PISSN: 00354511     EISSN: None     Source Type: Journal    
DOI: 10.1007/s00397-003-0353-4     Document Type: Article

References (25)

1. Adams CH, Hutchings LR, Klein PG, McLeish TCB, Richards RW (1996) Synthesis and dynamic rheological behavior of polybutadiene star polymers. Macromolecules 29:5717-5722
2. Barone JR, Plucktaveesak N, Wang S-Q (1998) Interfacial molecular instability mechanism for sharkskin phenomenon in capillary extrusion of linear polyethylenes. J Rheol 42:813-832
3. Brochard F, de Gennes PG (1992) Sheardependent slippage at a polymer/solid interface. Langmuir 8:3033-3037
4. Cogswell FN (1977) Stretching flow instabilities at the exits of extrusion dies. J Non-Newtonian Fluid Mech 2:37-47
5. Cogswell FN, Barone JR, Plucktaveesak N, Wang S-Q (1999) The mystery of sharkskin. J Rheol 43:245-252
6. de Gennes PG (1985) Wetting: statics and dynamics. Rev Mod Phys 57:827-863
7. Denn MM (2001) Extrusion instabilities and wall slip. Annu Rev Fluid Mech 33: 265-287
8. Fernández M, Santamaría A (2001) A striking hydrodynamic phenomenon: split of a polymer melt in capillary flow. J Rheol 45: 595-602
9. Inn YW, Fischer RJ, Shaw MT (1998) Visual observation of development of sharkskin melt fracture in polybutadiene extrusion. Rheol Acta 37:573-582
10. Kapnistos M, Semenov AN, Vlassopoulos D, Roovers J (1999) Viscoelastic response of hyperstar polymers in the linear regime. J Chem Phys 111:1753-1759
11. Lim FJ, Schowalter WR (1989) Wall slip of narrow molecular weight distribution polybutadienes. J Rheol 33, 1359-1382
12. Migler KB, Son Y, Qiao F, Flynn K (2002) Extensional deformation, cohesive failure, and boundary conditions during sharkskin melt fracture. J Rheol 46:383-400
13. Milner MC, McLeish TCB (1998) Arm-length dependence of stress relaxation in star polymer melts. Macromolecules 31:7479-7482
14. Moynihan RH, Baird DG, Ramanathan R (1990) Additional observations on the surface melt fracture-behavior of linear low-density polyethylene. J Non-Newtonian Fluid Mech 36:255-263
15. Pakula T, Vlassopoulos D, Fytas G, Roovers J (1998) Structure and dynamics of melts of multiarm polymer stars. Macromolecules 31:8931-8940
16. Roovers J, Toporowski P (1989) Synthesis and characterization of multiarm star polybutadienes. Macromolecules 22:1897-1903
17. Rutgers R, Mackley M (2000) The correlation of experimental surface extrusion instabilities with numerically predicted exit surface stress concentrations and melt strength for linear low density polyethylene. J Rheol 44:1319-1334
18. Tordella JP (1956) Fracture in the extrusion of amorphous polymers through capillaries. J Appl Phys 7:454-458
19. Vega DA, Sebastian JM, Russel WB, Register RA (2002) Viscoelastic properties of entangled star polymer melts: comparison of theory and experiment. Macromolecules 35:169-177
20. Venet C, Vergnes B (2000) Stress distribution around capillary die exit: an interpretation of the onset of sharkskin defect. J Non-Newtonian Fluid Mech 93:117-132
21. Wang S-Q (1999) Molecular instabilities and dynamics at polymer/wall interfaces: origins of flow instabilities and wall slip. Adv Polym Sci 138:227-277
22. Wang S-Q, Drda PA (1997) Stick-slip transition in capillary flow of linear polyethylene. 3. Surface conditions. Rheol Acta 36:128-134
23. Wang S-Q, Drda PA, Inn YW (1996). Exploring molecular origins of sharkskin, partial slip, and slope change in flow curves of linear low density polyethylene. J Rheol 40:875-898
24. Yang X, Ishida H, Wang S-Q (1998a). Wall slip and absence of interfacial flow instabilities in capillary flow of various polymer melts. J Rheol 42:63-80
25. Yang X, Wang S-Q, Adel H, Ishida H (1998b) Fast flow behavior of highly entangled monodisperse polymers. 1. Interfacial stick-slip transition of polybutadiene melts. Rheol Acta 37:415-423