Predicting Steady and Oscillatory Shear Rheological Properties of CMC and Guar Gum Blends from Concentration and Molecular Weight Data

The steady shear and oscillatory shear Theological properties of aqueous solutions of sodium carboxymethylcellulose (CMC), guar gum and CMC/guar blends of ratios 3:1, 2:1, 1:1, 1:2, and 1:3 by weight were measured in the concentration range of 0.5, 0.75, 1.0, and 1.5% by weight. For the CMC/guar systems, the zero‐shear rate viscosity, η 0 , time constants λ 1 and λ 2 and the slopes of the non‐Newtonian region of the log η vs log λ and log η′ vs log ω curves, − S η and − S η , can be related to concentration and molecular weight.