Rheological properties of concentrated solutions of cellulose and its mixtures with other polymers in orthophosphoric acid

• Published in: Journal of engineering physics and thermophysics Vol. 84; no. 3; pp. 594 - 598
• Main Authors: Grinshpan, D. D., Gonchar, A. N., Tsygankova, N. G., Makarevich, S. E., Savitskaya, T. A., Sheimo, E. V.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-05-2011; Springer; Springer Nature B.V
• Subjects: Additives; Cellulose; Chitosan; Classical Mechanics; Complex Systems; Engineering; Engineering Thermodynamics; Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Phosphoric acid; Polyvinyl alcohols; Rheological properties; Shear flow; Spinning; Thermodynamics; mixtures of polymers in orthophosphoric acid; solution structurization in the shearing process; spinning solutions; rheological properties
• ISSN: 1062-0125; 1573-871X
• DOI: 10.1007/s10891-011-0510-z

We have investigated the specific features of the steady shear flow of concentrated spinning solutions of cellulose and its mixtures with polyvinyl alcohol, chitosan, and polyacrylonitryl in orthophosphoric acid in the temperature range of 303–323 K. Rheological curves including highest- and lowest-viscosity regions have been obtained. The influence of the nature of the polymer additive and its content on the profile of rheological curves of the cellulose solution has been established.