Abstract
Abnormal rheological behavior is observed during capillary extrusion with a linear low density polyethylene (LLDPE). The nominal viscosity in the stick-slip flow regime and the gross melt fracture regime increase with a rise in temperature. This is attributed to slippage of the polymer melts. It is generally accepted that the occurrence of slippage can be detected by a Mooney analysis. However, it is found that the Mooney analysis is not applicable to detect the occurrence of slippage in the gross melt fracture regime. This is attributed to the main assumptions in the Mooney analysis being invalid in this regime, mainly due to the presence of a turbulent-like flow pattern. We suggest that failure of the time-temperature superposition principle can be used as an indication of slippage for polymer melts.
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Inn YW, Fischer RJ, Shaw MT (1998) Rheol Acta 37:573
Hatzikiriakos SG, Dealy JM (1992) J Rheol 36:845
Denn MM (2001) Annu Rev Fluid Mech 33:265
Weill A (1980) J Non-Newtonian Fluid Mech 7:303
Kalika DS, Denn MM (1987) J Rheol 3:815
Münstedt H, Schmidt M, Wassner E (2000) J Rheol 44:413
Migler KB, Son Y, Qiao F, Flynn K (2002) J Rheol 46:383
Lee H, Kim DH, Son Y (2006) Polymer 47:3929
Doerpinghaus PJ, Baird DG (2003) Rheol Acta 42:544
Ramamurthy AV (1986) J Rheol 30:337
Pérez-González J (2005) J Rheol 49:571
El Kissi N, Piau JM (1994) J Rheol 38:1447
White JL, Yamane H (1987) Pure Appl Chem 59:193
Pudjijanto S, Denn MM (1994) J Rheol 38:1735
Liang RF, Mackley MR (2001) J Rheol 45:211
Atwood BT, Schowalter WR (1989) Rheol Acta 28:134
Carreau PJ, De Kee DCR, Chhabra RP (1997) Rheology of Polymeric Systems: Principles and Application. Hanser Publishers, Munich Vienna New York, Chap 3, pp 72–73
Wang SQ, Drda PA (1997) Macromol Chem Phys 198(3):673
Bagley EB, Birks AM (1960) J Appl Phys 31:556
Cook NP, Furno FJ, Eirich FR (1965) J Rheol 9:405
Tordellar JP (1957) J Rheol 1:203
Tordellar JP (1963) J Appl Polym Sci 7:215
Migler KB, Lavallee C, Dillon MP, Woods SS, Gettinger CL (2001) J Rheol 45:565
Pathak JA, Colby RH, Floudas G, Jerome R (1999) Macromolecules 32:2553
Colby RH, Gillmor JR, Galli G, Laus M, Ober CK, Hall E (1993) Liquid Crystals 13:233
Carreau PJ, De Kee DCR, Chhabra RP (1997) Rheology of Polymeric Systems: Principles and Application. Hanser Publishers, Munich Vienna New York, Chap 1, pp 6–8
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Kim, J., Kim, D.H. & Son, Y. Abnormal Rheological Behavior of Linear Low Density Polyethylene Melts at High Shear Rate . Polym. Bull. 60, 821–828 (2008). https://doi.org/10.1007/s00289-008-0907-9
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DOI: https://doi.org/10.1007/s00289-008-0907-9