Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | 2092-2101 |
| Numero di pagine | 10 |
| Rivista | Polymer Engineering and Science |
| Volume | 51 |
| Stato di pubblicazione | Published - 2011 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Polymers and Plastics
- Materials Chemistry
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The rate of polymerization in two loci reaction systems: VDF-HFP precipitation copolymerization in supercritical carbon dioxide. / Filardo, Giuseppe; Galia, Alessandro; Costa, Liborio Ivano; Costa, Liborio I.; Storti, Giuseppe; Morbidelli, Massimo.
In: Polymer Engineering and Science, Vol. 51, 2011, pag. 2092-2101.Risultato della ricerca: Article
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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 -