Evaluation of rheological properties of non-Newtonian fluids in internal mixers: an alternative method based on the power law model.: An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00098C8VW
ISBN-13978B00098C8V9
AvailabilityAvailable for download now
Sales Rank9,850,506
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on September 1, 1998. The length of the article is 4084 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: A new method was developed to evaluate rheological properties of polymer melts such as shear stress, shear rate, apparent viscosity and other rheological parameters in internal mixers. It is based on the classical power law model where the power law index n is directly evaluated from a set of data containing speed S, torque M, and the consistency index m is indirectly determined by an empirical relation. The method is based on a model with only one geometrical parameter ([Alpha]), which involves a chamber radius [R.sub.2] and an equivalent radius [R.sub.e]. It is assumed that the measuring head consists of two adjacent sets of coaxial cylinders. This method has advantages over previously reported models that use two parameters and do not propose a straightforward method to evaluate m. The pseudoplastic nature of the polymer melt decreases as the rate of loss of structural points, i.e., molecular entanglements and network junctions, increases, which produces greater mobility of the melt. A relationship between [Alpha] and C(n) is found, which is simpler than other models previously reported. These results further demonstrate the feasibility of evaluating rheological properties of polymer melts in internal mixers.
Citation Details
Title: Evaluation of rheological properties of non-Newtonian fluids in internal mixers: an alternative method based on the power law model.
Author: J. Guillen Mallette
Publication:Polymer Engineering and Science (Refereed)
Date: September 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: v38 Issue: n9 Page: p1436(7)
Distributed by Thomson Gale
From the author: A new method was developed to evaluate rheological properties of polymer melts such as shear stress, shear rate, apparent viscosity and other rheological parameters in internal mixers. It is based on the classical power law model where the power law index n is directly evaluated from a set of data containing speed S, torque M, and the consistency index m is indirectly determined by an empirical relation. The method is based on a model with only one geometrical parameter ([Alpha]), which involves a chamber radius [R.sub.2] and an equivalent radius [R.sub.e]. It is assumed that the measuring head consists of two adjacent sets of coaxial cylinders. This method has advantages over previously reported models that use two parameters and do not propose a straightforward method to evaluate m. The pseudoplastic nature of the polymer melt decreases as the rate of loss of structural points, i.e., molecular entanglements and network junctions, increases, which produces greater mobility of the melt. A relationship between [Alpha] and C(n) is found, which is simpler than other models previously reported. These results further demonstrate the feasibility of evaluating rheological properties of polymer melts in internal mixers.
Citation Details
Title: Evaluation of rheological properties of non-Newtonian fluids in internal mixers: an alternative method based on the power law model.
Author: J. Guillen Mallette
Publication:Polymer Engineering and Science (Refereed)
Date: September 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: v38 Issue: n9 Page: p1436(7)
Distributed by Thomson Gale
