| Titre : | Partition coefficients of methyl methacrylate and acetone between polymer and compressed carbon dioxide phases by an in situ infrared spectroscopy method (2009) |
| Auteurs : | Jun He, Auteur ; Bo Wang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 15, Août 2009) |
| Article en page(s) : | pp. 7354–7358 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 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 |
