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Diffusivity and solubility of carbondioxide in diluted polymer solutions
Author(s) -
Lohse M.,
Alper E.,
Quicker G.,
Deckwer W.D.
Publication year - 1981
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690270414
Subject(s) - polyvinyl alcohol , thermal diffusivity , diffusion , polyethylene glycol , thermodynamics , exponent , polymer , solubility , viscosity , aqueous solution , chemistry , absorption (acoustics) , materials science , polymer chemistry , organic chemistry , composite material , linguistics , physics , philosophy
Diffusion coefficients of CO 2 in aqueous Newtonian solutions of polyvinyl alcohol and polyethylene glycol with molecular weights varying from 1500 to 100,000 were obtained from absorption rate measurements in a wetted‐wall column and the CO 2 solubilities determined independently. The exponent A of the diffusivity‐viscosity relation is found to be a strong function of the molecular weight of the applied polymer. The data suggest the following correlation:\documentclass{article}\pagestyle{empty}\begin{document}$$ (D/D_0) = (\mu /\mu _0) ^{-3.7\sqrt {M_0 /M_P}} $$\end{document} which indicates that the exponent may vary from 0.04 to 0.4 for the solutions studied.