Shear rheology of diluted solutions of high molecular weight cellulose

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Abstract
A steady‐state and dynamical rheological study was performed with dilute solutions (1–4%) of high molecular weight cellulose (Mw = 350,000). The solutions are strongly viscoelastic. The steady‐state viscosity and the first normal stress difference have a power law dependence on the shear rate. The power law indices have the same dependence on temperature and concentration. These results as well as the correlation between the steady‐state viscosity and the real part of the complex viscosity are in good agreement with the Spriggs model. The 4% concentrated solution shows the beginning of a rubber‐like storage modulus plateau, suggesting the existence of an entanglement network.