SHEAR-INDUCED DIMERIZATION

Authors
Citation
Gt. Evans, SHEAR-INDUCED DIMERIZATION, The Journal of chemical physics, 107(18), 1997, pp. 7472-7476
Citations number
17
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
00219606
Volume
107
Issue
18
Year of publication
1997
Pages
7472 - 7476
Database
ISI
SICI code
0021-9606(1997)107:18<7472:SD>2.0.ZU;2-4
Abstract
The Yamada-Kawasaki theory of nonlinear response was applied to the ca lculation of the frequency and shear-rate dependent shear viscosity of a dilute Brownian suspension of harmonically bound dumbbells. When th e dumbbells were allowed to dimerize, as implemented by the Wertheim t heory of association, the resulting fluid displayed exhibited shear-th inning and shear-thickening regimes. Head-to-head dimerization led to shear thinning, and for shear thickening to occur, the rotational corr elation time of the dimers must be commensurate with those of the mono mers, The present findings were evaluated in light of the observed she ar-induced coagulation in micellar solutions. (C) 1997 American Instit ute of Physics.