Vapour-liquid equilibria in water plus poly(ethylene glycol) systems: New experiments and cumulative thermodynamic processing of all data.

0522193 - ÚCHP 2021 RIV GB eng J - Journal Article
Pavlíček, Jan - Bogdanić, Grozdana - Wichterle, Ivan - Izák, Pavel
Vapour-liquid equilibria in water plus poly(ethylene glycol) systems: New experiments and cumulative thermodynamic processing of all data.
Journal of Chemical Thermodynamics. Roč. 140, JAN 2020 (2020), č. článku 105901. ISSN 0021-9614. E-ISSN 1096-3626
R&D Projects: GA ČR(CZ) GA18-05484S
Institutional support: RVO:67985858
Keywords : experimental data * poly(ethylene glycol) * vapour-liquid equilibrium * correlation
OECD category: Physical chemistry
Impact factor: 3.178, year: 2020
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S0021961419301405?via%3Dihub

Dependences of total pressure on the composition of water + poly(ethylene glycol) systems were measured with both the ebulliometric and static method. New data on vapour-liquid equilibria cover the temperature range 303.15–363.15 K and the range of the weight fraction of solvent 0.5–1.0 for polymers of nominal molecular weight 1000, 3000, and 6000 g mol-1. These data together with those determined earlier were correlated using the UNIQUAC free-volume (FV) model to be consistent with previous studies. In addition, all available literature data on this system were processed in the same way. As a result, the obtained average deviations were used as indicators of data quality. Average deviation of experimental
and calculated solvent activity was about 0.0004 for all our data. The evaluated adjustable parameters were proportional to molecular weight, which ensures reliable interpolation and even extrapolation beyond the investigated temperature and molecular weight ranges.
Permanent Link: http://hdl.handle.net/11104/0306690