Rheology of a cellulose graft copolymer. Comparison with other closely packed gel thickeners
1977
Taylor, N.W. | Bagley, E.B.
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 eta in either water or salt solution are reduced to a single master curve by use of the reduced viscosity function eta /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 thickeners of similar eta /cQ. Among all examples of this class of thickener, the plateau values of eta /cQ, which occur at cQ greater than 2, are approximately inversely proportional to M//c.
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