RHEOLOGICAL STUDIES OF HIGH-CONCENTRATION
CELLULOSE SULFATE-ACETATE SOLUTIONS

D. D. Grinshpan, S. M. Tret'yakova, N. G. Tsygankova,
S. E. Makarevich, and T. A. Savitskaya

UDC 661.728.014:532.78

With the method of homogeneous synthesis, various salt 
forms of cellulose sulfate-acetate containing Li+, Na+,  
K+, Ca2+, Mg2+, Zn2+, and Co2+ as compensating cations have been obtained. 
The flow curves, the concentration and temperature dependences of 
the shear viscosity of aqueous solutions of cellulose sulfate-acetate 
have a form characteristic of liquid-crystal systems. For solutions 
of all salts except for potassium salt, spontaneous formation of the 
anisotropic phase in the form of individual spherulites, spherulite 
bands, structures of the fingerprint type, and other more complex 
formations has been registered. A new hydrodynamic criterion that 
permits predicting the realization of lyotropic mesomorphism in solutions 
of cellulose derivatives is proposed.

Belarusian State University, 14 Leningradskaya Str., Minsk, 
220050, Belarus. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 78, No. 5, pp. 41-47, September-October, 2005. Original 
article submitted October 14, 2004.