| A study of the stick-slip phenomenon in single-screw extrusion of linear polyethylene.: An article from: Polymer Engineering and Science |  | Authors: D. Kay, P.j. Carreau, P.g. Lafleur, L. Robert, B. Vergnes
Publisher: Society of Plastics Engineers, Inc.
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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on January 1, 2003. The length of the article is 5727 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: We present results of a study on the stick-slip phenomenon observed for two linear polyethylenes (HDPE and LLDPE). Experiments were carried out in a single-screw extruder using dies of different diameters and L/D ratios. The pressure and the mass flow rate have been measured simultaneously and the instant mass flow rate was determined using laser Doppler velocimetry. Our results clearly confirm the hypothesis that the flow jumps from one stable branch to the other during oscillations as suggested in the literature. The role of the melt compressibility in the reservoir is also established. The effect of the average mass flow rate imposed by the extruder [Q.sub.IN] on the respective compression and decompression phases is in good agreement with the effect predicted by the mass balance in the reservoir. We also used different reservoir volumes to confirm that the period of oscillations increases with the compressed melt volume upstream of the die.
Citation Details
Title: A study of the stick-slip phenomenon in single-screw extrusion of linear polyethylene.
Author: D. Kay
Publication: Polymer Engineering and Science (Refereed)
Date: January 1, 2003
Publisher: Society of Plastics Engineers, Inc.
Volume: 43 Issue: 1 Page: 78(13)
Distributed by Thomson Gale
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