Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Role of processing aids in the extrusion of molten polymers

Role of processing aids in the extrusion of molten polymers Product quality and, in general, processing windows and rates of production in the extrusion of molten polymers are limited by various flow instabilities (mainly melt fracture) that are observed at high production rates. While there still are unresolved issues in comprehending these phenomena, industry demands for process optimization dictate the employment of processing aids (PAs) for product quality improvement and energy requirement reduction. In this review paper, most commercially used processing aids (PAs) are discussed, namely, fluoroelastomers, stearates, small amounts of polymers blended with the process polymer, and the newly discovered boron nitride as pure and in combination with other fluoroelastomers. This paper focuses on the appropriate and optimum usage of the various PAs as well as on the mechanism that underlies their action for flow enhancement and instability elimination. Finally, numerous experimental observations are discussed, and several examples are illustrated. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Vinyl & Additive Technology Wiley

Role of processing aids in the extrusion of molten polymers

Loading next page...
 
/lp/wiley/role-of-processing-aids-in-the-extrusion-of-molten-polymers-HS4VvNngpC

References (72)

Publisher
Wiley
Copyright
Copyright © 2002 Society of Plastics Engineers
ISSN
1083-5601
eISSN
1548-0585
DOI
10.1002/vnl.10340
Publisher site
See Article on Publisher Site

Abstract

Product quality and, in general, processing windows and rates of production in the extrusion of molten polymers are limited by various flow instabilities (mainly melt fracture) that are observed at high production rates. While there still are unresolved issues in comprehending these phenomena, industry demands for process optimization dictate the employment of processing aids (PAs) for product quality improvement and energy requirement reduction. In this review paper, most commercially used processing aids (PAs) are discussed, namely, fluoroelastomers, stearates, small amounts of polymers blended with the process polymer, and the newly discovered boron nitride as pure and in combination with other fluoroelastomers. This paper focuses on the appropriate and optimum usage of the various PAs as well as on the mechanism that underlies their action for flow enhancement and instability elimination. Finally, numerous experimental observations are discussed, and several examples are illustrated.

Journal

Journal of Vinyl & Additive TechnologyWiley

Published: Mar 1, 2002

There are no references for this article.