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Study of the Hydrodynamic and Viscoelastic Properties Affecting the Surface Appearance of Extruded EPDM Compounds
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English
Abstract
An experimental study was aimed at understanding the mechanisms establishing the surface appearance of extruded EPDM compounds for applications where aesthetic appearance is critical. The study shows that surface appearance is directly proportional to the extent of viscous heating in the die, and hence can be controlled by the degree of shearing action, either by screw and die design or screw speed. Both surface appearance and extrudate swell can be related to the viscoelastic properties of the EPDM polymer through the dimensionless Deborah and Euler numbers. Knowledge of the parameters affecting surface appearance can be applied to better design of EPDM polymers for such applications as automotive seals for windows and doors, which are comprised of both dense and sponge extruded profiles.
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Citation
Cheremisinoff, N. and Shulman, C., "Study of the Hydrodynamic and Viscoelastic Properties Affecting the Surface Appearance of Extruded EPDM Compounds," SAE Technical Paper 890363, 1989, https://doi.org/10.4271/890363.Also In
Elastomer Developments-Materials, Applications, Processing and Performance
Number: SP-0787; Published: 1989-02-01
Number: SP-0787; Published: 1989-02-01
References
- Bird, R. B. Stewart, W. E. Lightfoot, E. N. Transport Phenomena John Wiley & Sons, Inc. New York 1960
- Chung, J. T. “Introduction to Torque Rheometry” 7 Encyclopedia of Fluid Mechanics Cheremisinoff N. P. Gulf Publishing Co. Houston, TX 1988
- Cheremisinoff, N. P. Polymer Mixing and Extrusion Technology Marcel Dekker Pub. New York, NY 1987
- Cheremisinoff, N. P. “Predicting the Extrusion Performance of EPDMs” Polymer-Plastics Technology and Engineering Journal Marcel Dekker Pub. New York, NY 27 1 1988
- Han, C. D. Rheology in Polymer Processing Academic Press New York 1976
- Keller, R. Cheremisinoff, N. P. “New Developments in Ethylene-Propylene Elastomers for Extruded Applications” Paper presented at Rubberex 86, Australasian Rubber Conference Melbourne, Australia April 29 1986
- Reiner, M. “Lectures in Theoretical Rheology” 133 North Holland Amsterdam 1960
- Shulman, C. B. “Unique Features of High Unsaturation EPDM Polymers,” paper presented at 128th Rubber Division Meeting Cleveland, Ohio Oct. 1985
- Skelland, A. H. P. Non-Newtonian Flow and Heat Transfer John Wiley & Sons, Inc. New York 1967
- Stella, G. Cheremisinoff, N. Pp. “Designing EPDM's for Production Efficiency” Paper presented at International Rubber Conference - Rubbercon 88