Phase behavior of the system hyperbranched polyglycerol+methanol+carbon dioxide

Experimental density and PC-SAFT modeling of Krytox® (perfluoropolyether) at pressures to 275MPa and temperatures to 533K

“…For polymer systems, these parameters are typically obtained by fitting the equation to experimental density data or to a combination of polymer density data and phase equilibria data for polymer-solvent mixtures [17][18][19][20]. The PC-SAFT EOS has been successfully used to predict the thermodynamic properties of many different kinds of polymer systems [17][18][19][20][21][22][23][24][25][26]. In certain instances group contribution (GC) methods have been used with the PC-SAFT EOS to estimate values for the three pure component parameters [17,27] rather than fitting the EOS to experimental data.…”

Hyperbranched Polymers in a Supercritical Fluid: Recent Progress on Phase Behavior and Modeling

“…However, the authors concluded that structural effects of the hyperbranched polyglycerol were not properly captured by the bPCP-SAFT model due to its incapability of taking into account intramolecular interactions. It was also verified by the fact that the prediction of the ternary system with bPCP-SAFT model requires a temperature-dependent binary parameter while the PC-SAFT EOS usually just needs a temperature-independent binary parameter when giving a reasonable prediction of the liquid-liquid-vapor equilibrium [62].…”

“…Besides the low-pressure studies mentioned above, Seiler, et al [57] [62,63]. The bubble-point pressures for the linear polymer system did not change much with the increase in the molecular weight of the polymer, while for hyperbranched polymer system the molecular weight showed a more pronounced effect on the bubble-point pressures, indicating that the branched structure is the main reason for the dependence of bubble-point pressures on the polymer size.…”

“…For the purpose of solving the above problem of hydrogen bonding overestimation, following Kozlowska's work, Schacht, et al [62] adjusted the two parameters of the bPCP-SAFT equation, association volume, AiBj , and energy interaction parameter, /k B , and applied the linear temperature-dependent binary interaction parameters based on the experiment data of hyperbranched polyglycerol + methanol + CO 2 with a specific composition. The obtained parameters were then used to predict the same system with different compositions and different polymer molecular weight.…”

Guidelines for reporting of phase equilibrium measurements (IUPAC Recommendations 2012)

“…5. Table 11: Equilibrium data involving multiple phase-transition types; (liquid + vapor) equilibrium data with phase separation in the liquid phase [78]. In this table, HPG is an abbreviation for hyperbranched polyglycerol.…”