Simple Apparatus for the Measurement of Total Pressure of Polymer + Solvent Mixtures.

0474283 - ÚCHP 2018 RIV DE eng J - Článek v odborném periodiku
Pavlíček, Jan - Bogdanić, Grozdana - Wichterle, Ivan
Simple Apparatus for the Measurement of Total Pressure of Polymer + Solvent Mixtures.
Chemical Engineering & Technology. Roč. 40, č. 5 (2017), s. 991-996. ISSN 0930-7516. E-ISSN 1521-4125.
[International Congress of Chemical and Process Engineering CHISA 2016 /22./and the 19th Conference PRES 2016. Prague, 27.08.2016-31.08.2016]
Grant CEP: GA ČR GA15-19542S
Institucionální podpora: RVO:67985858
Klíčová slova: vapor-liquid equilibrium * polymer-solvent systems * static cells
Obor OECD: Physical chemistry
Impakt faktor: 1.588, rok: 2017

A new apparatus for determining the total pressure in binary systems with one nonvolatile component, such as polymer-solvent mixtures, was designed. In contrast to the ebulliometric method, it enables measurement of the pressure above solutions across wider concentration ranges. The apparatus was tested on mixtures of water and poly(ethylene glycol). The tested polymers had three nominal molar weights. The measurements were correlated with the UNIQUAC-free volume model described earlier and compared with the published data. The applicability of known predictive models on the measurements was also tested and it was found that the entropic free-volume model yielded the best prediction of vapor-liquid equilibria for the studied systems.
Trvalý link: http://hdl.handle.net/11104/0271626