6533b82efe1ef96bd1293bd5
RESEARCH PRODUCT
Copolymerization of VDF and HFP in Supercritical Carbon Dioxide: A Robust Approach for Modeling Precipitation and Dispersion Kinetics
Massimo MorbidelliAlessandro GaliaOnofrio ScialdoneGiuseppe FilardoLiborio Ivano CostaLiborio Ivano CostaLoredana FerroGiuseppe Stortisubject
Supercritical carbon dioxideMaterials sciencePolymers and PlasticsGeneral Chemical EngineeringDiffusionThermodynamicsGeneral ChemistrySupercritical fluidchemistry.chemical_compoundchemistryPolymerizationPhase (matter)Polymer chemistryInterphaseHexafluoropropyleneDispersion (chemistry)description
A kinetic model is developed for the heterogeneous free-radical copolymerization of vinylidene fluoride and hexafluoropropylene in supercritical CO2. The model accounts for polymerization in both the dispersed (polymer-rich) phase and in the continuous (polymer-free) supercritical phase, for radical interphase transport, diffusion limitations, and chain-length-dependent termination in the polymer-rich phase. A parameter evaluation strategy is developed and detailed to estimate most of the kinetic parameters a priori while minimizing their evaluation by direct fitting. The resulting model predictions compare favorably with the experimental results of conversion and MWD at varying monomer feed composition, monomer concentration, interphase area, and pressure of the system.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-11-17 | Macromolecular Reaction Engineering |