The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide.(Report): An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB005XFTT40
ISBN-13978B005XFTT45
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on October 1, 2011. The length of the article is 6732 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scC[.sub.2]) under heterogeneous conditions, the reaction occurs both in the continuous C[O.sub.2]-rich phase and in the dispersed polymer-rich phase. The two phases being characterized by different values of reactant concentrations and kinetic parameters, one would expect that the reaction kinetics is affected by the polymer phase holdup in the reactor. However, the reaction rate is almost insensitive to the amount of produced polymer, at least at specific reaction conditions. This apparent contradiction is discussed and clarified in this paper by a series of comparative simulations carried out using different models, accounting for the reaction in one single phase (one-locus) or in two phases (two-loci). This analysis provides general procedures which can be used to design experimental investigations able to identify the number of reaction loci for a given heterogeneous polymerization system. POLYM. ENG. SCI., 51:2093-2102, 2011. [c]2011 Society of Plastics Engineers
Citation Details
Title: The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide.(Report)
Author: Liborio I. Costa
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: October 1, 2011
Publisher: Society of Plastics Engineers, Inc.
Volume: 51 Issue: 10 Page: 2093(10)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scC[.sub.2]) under heterogeneous conditions, the reaction occurs both in the continuous C[O.sub.2]-rich phase and in the dispersed polymer-rich phase. The two phases being characterized by different values of reactant concentrations and kinetic parameters, one would expect that the reaction kinetics is affected by the polymer phase holdup in the reactor. However, the reaction rate is almost insensitive to the amount of produced polymer, at least at specific reaction conditions. This apparent contradiction is discussed and clarified in this paper by a series of comparative simulations carried out using different models, accounting for the reaction in one single phase (one-locus) or in two phases (two-loci). This analysis provides general procedures which can be used to design experimental investigations able to identify the number of reaction loci for a given heterogeneous polymerization system. POLYM. ENG. SCI., 51:2093-2102, 2011. [c]2011 Society of Plastics Engineers
Citation Details
Title: The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide.(Report)
Author: Liborio I. Costa
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: October 1, 2011
Publisher: Society of Plastics Engineers, Inc.
Volume: 51 Issue: 10 Page: 2093(10)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
