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Rheology of a cellulose graft copolymer. Comparison with other closely packed gel thickeners
Author(s) -
Taylor N. W.,
Bagley E. B.
Publication year - 1977
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.1977.070210616
Subject(s) - rheology , copolymer , polyelectrolyte , materials science , polymer chemistry , viscosity , swelling , suspension (topology) , cellulose , chemical engineering , ionic strength , volume fraction , polymer , chemistry , composite material , aqueous solution , organic chemistry , mathematics , homotopy , pure mathematics , engineering
Hydrolyzed cellulose–polyacrylonitrile graft copolymer is a polyelectrolyte gel suspension with a high viscosity in water. It is a closely packed swollen gel particle suspension in the appropriate concentration range and has similar rheological properties to other thickeners of this type. Viscosities η in either water or salt solution are reduced to a single master curve by use of the reduced viscosity function η/ cQ , where c is weight fraction of polymer and Q is swelling volume in excess solvent of the same ionic strength. The effective molecular weight between crosslinks, M c , determined from shear modulus, corresponds to M c values for other closely packed gel thickners of similar η/ cQ . Among all examples of this class of thickener, the plateau values of η/ cQ , which occur at cQ > 2, are approximately inversely proportional to M c .