Abstract
This paper presents the vapor-liquid (VLE) and liquid-liquid (LLE) phase equilibria predictions for polystyrene in two theta solvents: cyclohexane and methylcyclohexane. VLE calculations were performed with the Elbro free volume method and a modified version of the PC-SAFT method, as well as with three UNIFAC type group contribution models: Entropic Free Volume + UNIFAC VLE 1 coeff., Entropic Free Volume + UNIFAC VLE 2coeff., and Oishi-Prausnitz + UNIFAC VLE 2coeff. Solvent activities were calculated for the polystyrene + cyclohexane and polystyrene + methylcyclohcxane solutions, and compared with experimental data. LLE predictions were performed with PC-SAFT method and compared with experimental data. The obtained results show that the PC-SAFT method gave the most accurate predictions for both VLE as well as LLE for the systems studied.
| Original language | English |
|---|---|
| Journal | Polish Journal of Chemistry |
| Volume | 80 |
| Issue number | 1 |
| Pages (from-to) | 65-79 |
| ISSN | 0137-5083 |
| Publication status | Published - 2006 |
Keywords
- UNIFAC
- solvent activities
- polystyrene
- PC-SAFT and Elbro free volume methods