Partition coefficients of methyl methacrylate and acetone between polymer and compressed carbon dioxide phases by an in situ infrared spectroscopy method / Jun He in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009)  

Partition coefficients of methyl methacrylate and acetone between polymer and compressed carbon dioxide phases by an in situ infrared spectroscopy method [texte imprimé] / Jun He, Auteur ; Bo Wang, Auteur . - 2009 . - pp. 7354–7358.
Chemical engineering
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7354–7358

Mots-clés :	Methyl methacrylate Acetone Polymer gaseous carbon dioxide phase Compressed Partition coefficients Fourier transform infrared spectroscopy method
Résumé :	Partition coefficients of methyl methacrylate and acetone between some polymer and compressed gaseous carbon dioxide phases were determined by an in situ Fourier transform infrared (FTIR) spectroscopy method with a special designed high pressure IR cell at 318.2 K and 2.0−7.0 MPa. At the same temperature and pressure, the partition coefficient for methyl methacrylate was higher than that for acetone between the same polymer and subcritical carbon dioxide. For most solute/polymer/CO2 systems, the partition coefficient of solute between the polymer and compressed gaseous carbon dioxide decreased with the pressure increase. Only for a methyl methacrylate/poly(methyl methacrylate)/CO2 system, the partiton coefficient was not sensitive to the pressure change at pressures lower than 3.9 MPa. A linear solvation free energy relationship was used to estimate the main tendency of the pressure dependency. With the pressure dependent polarizability−dipolarity parameter of carbon dioxide, the calculated results were in accord with some experimental results.
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie801824y