The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide

Giuseppe Filardo, Alessandro Galia, Liborio Ivano Costa, Liborio I. Costa, Giuseppe Storti, Massimo Morbidelli

Risultato della ricerca: Article

3 Citazioni (Scopus)

Abstract

When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scCO 2) under heterogeneous conditions, the reaction occurs both in the continuous CO 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., 2011. © 2011 Society of Plastics Engineers.
Lingua originaleEnglish
pagine (da-a)2092-2101
Numero di pagine10
RivistaPolymer Engineering and Science
Volume51
Stato di pubblicazionePublished - 2011

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Carbon Dioxide
Copolymerization
Carbon dioxide
Polymers
Polymerization
Carbon Monoxide
Kinetic parameters
Reaction kinetics
Design of experiments
Reaction rates
1,1-difluoroethylene

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry
  • Polymers and Plastics

Cita questo

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title = "The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide",
abstract = "When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scCO 2) under heterogeneous conditions, the reaction occurs both in the continuous CO 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., 2011. {\circledC} 2011 Society of Plastics Engineers.",
author = "Giuseppe Filardo and Alessandro Galia and Costa, {Liborio Ivano} and Costa, {Liborio I.} and Giuseppe Storti and Massimo Morbidelli",
year = "2011",
language = "English",
volume = "51",
pages = "2092--2101",
journal = "Polymer Engineering and Science",
issn = "0032-3888",
publisher = "John Wiley and Sons Inc.",

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TY - JOUR

T1 - The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide

AU - Filardo, Giuseppe

AU - Galia, Alessandro

AU - Costa, Liborio Ivano

AU - Costa, Liborio I.

AU - Storti, Giuseppe

AU - Morbidelli, Massimo

PY - 2011

Y1 - 2011

N2 - When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scCO 2) under heterogeneous conditions, the reaction occurs both in the continuous CO 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., 2011. © 2011 Society of Plastics Engineers.

AB - When the copolymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) is carried out in supercritical carbon dioxide (scCO 2) under heterogeneous conditions, the reaction occurs both in the continuous CO 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., 2011. © 2011 Society of Plastics Engineers.

UR - http://hdl.handle.net/10447/76598

M3 - Article

VL - 51

SP - 2092

EP - 2101

JO - Polymer Engineering and Science

JF - Polymer Engineering and Science

SN - 0032-3888

ER -