Esterification in reactive extrusion.: An article from: Polymer Engineering and Science
Book Details
Author(s)C. Maier, M. Lambla
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00096MB1G
ISBN-13978B00096MB16
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on August 15, 1995. The length of the article is 5686 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 condensation type reaction has been studied for reactive extrusion in a twin-screw extruder. The esterification reaction is to graft a nonylphenyl-ethoxylate (NP8) onto a pre-maleated ethylene-propylene ([EPR.sub.MA]). The kinetics were initially characterized in the static mixture using a thermally controlled cell in a FTIR spectrometer. These were then used to predict the conversion along the length of the extruder screws, having determined the residence time distribution at various sampling locations. A reasonable fit with the data was obtained, although the kinetics seem to be slightly faster in the flowing medium than those predicted. Over short screw distances, the equilibrium rapidly approached equilibrium. Moreover, the NP8 was shown to penetrate the [EPR.sub.MA] within screw distance of less than 1.3 L/D, despite using conveying elements known for their minimal mixing capacity. Within the molten medium, a mixing model showed that obtaining the expected conversion in a product does not imply that the reactants in the product have in fact been well mixed.
Citation Details
Title: Esterification in reactive extrusion.
Author: C. Maier
Publication:Polymer Engineering and Science (Refereed)
Date: August 15, 1995
Publisher: Society of Plastics Engineers, Inc.
Volume: v35 Issue: n15 Page: p1197(9)
Distributed by Thomson Gale
From the author: A condensation type reaction has been studied for reactive extrusion in a twin-screw extruder. The esterification reaction is to graft a nonylphenyl-ethoxylate (NP8) onto a pre-maleated ethylene-propylene ([EPR.sub.MA]). The kinetics were initially characterized in the static mixture using a thermally controlled cell in a FTIR spectrometer. These were then used to predict the conversion along the length of the extruder screws, having determined the residence time distribution at various sampling locations. A reasonable fit with the data was obtained, although the kinetics seem to be slightly faster in the flowing medium than those predicted. Over short screw distances, the equilibrium rapidly approached equilibrium. Moreover, the NP8 was shown to penetrate the [EPR.sub.MA] within screw distance of less than 1.3 L/D, despite using conveying elements known for their minimal mixing capacity. Within the molten medium, a mixing model showed that obtaining the expected conversion in a product does not imply that the reactants in the product have in fact been well mixed.
Citation Details
Title: Esterification in reactive extrusion.
Author: C. Maier
Publication:Polymer Engineering and Science (Refereed)
Date: August 15, 1995
Publisher: Society of Plastics Engineers, Inc.
Volume: v35 Issue: n15 Page: p1197(9)
Distributed by Thomson Gale
