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《ACTA POLYMERICA SINICA》 1995-03
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RHEOLOGICAL PROPERTIES FOR CONCENTRATED SOLUTION OF CHITOSAN ZERO SHEAR VISCOSITIES

WANG Wei; XU Deshi(Laboratary of Polymer Physics Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022)  
Flow properties for concentrated solution of chitosan were described in 50%HCOOH,50%CH3COOH, 0.2mol/l HCl and 0.1mol/l CH3COOH+0.1mol/l CH3COONa under the concentration from 2 to 5g/100ml solvent. Flow equations presented in literature,such as Ferry equation,Cross equation and Ballauff equation,were tested from the point of view of the extrapolating method for evaluating the zero shear viscosities.The results of extrapolation were compared with the values measured by falling-ball method. It was shown that the method based on Cross equation gave relatively good results.
【Fund】: 国家自然科学基金
【CateGory Index】: O631.4
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