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Rheology of guar solutions
Author(s) -
Whitcomb Patrick J.,
Gutowski John,
Howland Warren W.
Publication year - 1980
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.1980.070251214
Subject(s) - guar , guar gum , rheology , shear thinning , shear rate , materials science , shear (geology) , aqueous solution , shear stress , chemical engineering , composite material , chemistry , organic chemistry , food science , engineering
The rheology of aqueous solutions of guar is studied over a wide range of shear rates and concentrations. At sufficiently low and high shear rates guar solutions show regions of Newtonian behavior, while at intermediate shear rates they are pseudoplastic. Preliminary normal stress data, and the effects of salt concentration are discussed. Molecular size distribution profiles of hydrated guar, obtained by low pressure (20 psig) filtration through Nucleopore filter membranes, are discussed in terms of guar purity.