Influence of molecular weight distribution on the melt extrusion of high density polyethylene (HDPE): Effects of melt relaxation behavior on morphology and orientation in HDPE extruded tubular films

Journal of Rheology

Volumn 40, Issue 6, 1996, Pages 1079-1093

  Yu, Ta Hua ^a   Wilkes, Garth L ^a  

^a State University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVATION ENERGY; CALCULATIONS; CRYSTAL ORIENTATION; CRYSTALLIZATION; EXTRUSION; HIGH DENSITY POLYETHYLENES; MELTING; MOLECULAR WEIGHT DISTRIBUTION; MORPHOLOGY; PLASTIC FILMS; RELAXATION PROCESSES; THERMAL EFFECTS;

CARREAU-YASUDA ANALYSIS; FIBRIL NUCLEI; MELT EXTRUSION; MELT RELAXATION; TUBULAR FILMS;

RHEOLOGY;

EID: 0030290244     PISSN: 01486055     EISSN: None     Source Type: Journal    
DOI: 10.1122/1.550801     Document Type: Article

References (26)

1. Bashir, Z., J. A. Odell, and A. Keller, "Stiff and strong polyethylene with shish kebab morphology by continuous melt extrusion," J. Mater. Sci. 22, 3993-4002 (1986).
2. Bird, R. B., R. C. Armstrong, and O. Hassager, Dynamics of Polymeric Liquids (Wiley, New York, 1987), Vol. 1, pp. 139-143.
3. Callahan, R. W. and H. M. Fisher (private communication).
4. Cantow, H. J., "The influence of molecular-weight distribution on the melt-flow properties of polystyrenes," Plast. Inst. Trans. J. 31, 141-145 (1963).
5. de Gennes, P. G., "Coil-stretch transition of dilute flexible polymers under ultrahigh velocity gradients," J. Chem. Phys. 60, 5030-5042 (1974).
6. Friedman, E. M. and R. S. Porter, "Polymer viscosity-molecular weight distribution correlations via blending: For high molecular weight poly(dimethyl siloxanes) and for polystyrenes," Trans. Soc. Rheol. 19, 493-508 (1975).
7. Graessley, W. W., "Molecular Entanglement Theory of Flow Behavior in Amorphous Polymers," J. Chem. Phys. 43, 2696-2703 (1965).
8. Graessley, W. W., "Viscosity of Entangling Polydisperse Polymers," J. Chem. Phys. 47, 1942-1953 (1967).
9. Graessley, W. W., "The Entanglement Concept in Polymer Rheology," Adv. Polym. Sci. 16, 70-99 and 132-148 (1974).
10. Grubb, D. T. and A. Keller, "Lamellar Morphology of Polyethylene: Electron Microscopy of a Melt-Crystallized Sharp Fraction," J. Polym. Sci., Phys. Ed. 18, 207-216 (1980).
11. Hermans, P. H., J. J. Hermans, D. Vermass, and A. Weidinger, "Deformation Mechanism of cellulose gels IV. General relationships between orientation of the crystalline and that of the amorphous portion," J. Polym. Sci. 3, 1-9 (1948).
12. Keller, A. and J. W. H. Kolnaar, "Chain extension and orientation: Fundamentals and relevance to processing and products," Progress Colloid Polym. Sci. 92, 81-102 (1993).
13. Misra, S., Lu, F. M., J. E. Spruiell, and G. C. Richeson, "Influence of Molecular Weight Distribution on the Structure and Properties of Melt-Spun Polypropylene Filaments," J. Appl. Polym. Sci. 56, 1761-1779 (1995).
14. Shaw, M. T., "Melt Characterization of Ultrahigh Molecular Weight Polyethylene Using Squeeze Flow," Polym. Eng. Sci. 17, 266-268 (1977).
15. Shroff, R. N. and A. M. Shida, "Correlation between Steady State Flow Curve and Molecular Weight Distribution for Polyethylene Melts," Polym. Eng. Sci. 11, 200-204 (1971).
16. Stein, R. S., "The X-Ray Diffraction, Birefringence, and Infrared Dichroism of Stretched Polyethylene. II. Generalized Uniaxial Crystal Orientation," J. Ploym. Sci. 31, 327-334 (1958).
17. Stein, R. S., "The X-Ray Diffraction, Birefringence, and Infrared Dichroism of Stretched Polyethylene. III. Biaxial Orientation," J. Plym. Sci. 31, 335-343 (1958).
18. Stein, R. S., "Optical Methods of Characterizing High Polymers," Newer Methods in Polymer Characterization (Wiley-Interscience, New York, 1964), Chap. IV.
19. Tanner, R. I., Engineering Rheology (Clarendon, Oxford, 1988), p. 353.
20. Vinogradov, G. V. and A. Y. Malkin, Rheology of Polymers (Springer-Verlag, Berlin, 1980), pp. 153-182, pp. 118-119.
21. Wilkes, G. L., "An Overview of the Basic Rheological Behavior of Polymer Fluids with an Emphasis on Polymer Melts," J. Chem. Education 58, 880-892 (1981).
22. Yasuda, K., R. C. Armstrong, and R. E. Cohen, "Shear flow properties of concentrated solutions of linear and star branched polystyrenes," Rheol. Acta 20, 163-178 (1981).
23. Yu, T. H. and G. L. Wilkes, "Orientation Determination and Morphology Study of High Density Polyethylene (HDPE) Estruded Tubular Films: Effect of Processing Variables and Molecular Weight Distribution," Polymer (in press).
24. Ziabicki, A., "Thoeretical analysis of oriented and nonisothermal crystallization I. Phenomenological considerations, isothermal crystallization accompanied by simultaneous orientation or disorientation," Colloid Polym. Sci. 252, 207-221 (1974).
25. Ziabicki, A., "Thoeretical analysis of oriented and non-isothermal cystallization II. Extension of the Kolmogoroff-Avrami-Evans theory onto processes with variable rates and mechanisms," Colloid Polym. Sci. 252, 433-447 (1974).
26. Ziabicki, A., "Thoeretical analysis of oriented and non-isothermal crystallization III. Kinetics of crystal orientation," Colloid Polym. Sci. 256, 332-342 (1978).