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Bead–spring macromolecules that perturb the solvent
Author(s) -
Grisafi S.
Publication year - 1990
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1990.070410730
Subject(s) - solvent , polymer , macromolecule , dispersion (optics) , materials science , bead , theta solvent , stress (linguistics) , phase (matter) , spring (device) , thermodynamics , solvent effects , polymer chemistry , chemistry , composite material , physics , organic chemistry , optics , biochemistry , linguistics , philosophy
A dispersion force based interaction between the solvent and the beads of a bead‐spring model macromolecule is used to couple the motion of the solvent and polymer in dilute solution flows. The polymer exerts a force on the solvent equal and opposite to the force that the solvent exerts on it. The friction coefficient approximation of the Rouse‐Zimm theories is eliminated. Both the solvent and polymer are subject to ensemble averaging over their respective phase space. A constitutive equation for the polymer stress is presented. By appropriate selection of the interaction potential between the solvent and the polymer, any normal stress difference can be predicted.