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Henry constants in polymer solutions with the van der waals equation of state
Author(s) -
Bithas Sotiris G.,
Kalospiros Nikolaos S.,
Kontogeorgis Georgios M.,
Tassios Dimitrios
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10410
Subject(s) - van der waals force , dimensionless quantity , supercritical fluid , van der waals equation , theorem of corresponding states , thermodynamics , equation of state , work (physics) , polymer , materials science , van der waals surface , constant (computer programming) , henry's law , statistical physics , van der waals radius , physics , chemistry , molecule , quantum mechanics , aqueous solution , composite material , programming language , computer science
The simple der Waals equation of state, as extended to polymer systems, is applied to the correlation and prediction of Henry constants in polymer solutions comprising five polymers and many nonpolar and polar solvents, including supercritical gases. The correlation achieved with one adjustable parameter is satisfactory, with typical errors within the experimental uncertainty and comparable to those with the more complex Perturbed Hard Chain Theory‐based equations of state with the same number of adjustable parameters. A predictive scheme for calculating Henry constants is also presented, which is a corresponding‐states correlation for a dimensionless Henry constant defined based on the van der Waals equation of state. Satisfactory results—often close to the ones from the one‐parameter correlation—are obtained for all systems investigated in this work. Compared with literature models that have been applied to the prediction of Henry constants in polymers, this scheme is simpler and applicable to supercritical gas‐containing systems.