Abstract
A study was made of intrinsic viscosity, translational diffusion and rapid sedimentation for fractions and non-fractionated samples of cellulose nitrate with an average content of [N] = 12·4 (CN-1) and 7·5% (CN-2). CN-1 was investigated in ethylacetate at 298°K, CN-2 - in a DMAA system with addition of 6% LiCl at 298°K. Values of Kuhn segment were determined from translational friction (260 ± 40) × 10 −10 m for CN-1 and (150 ± 30) × 10 −10m for CN-2 and the hydrodynamic cross section of molecules (12 ± 5) × 10 −10 m for both samples. Kuhn segments determined from viscometric data by plotting the dependence of (M 2/[η]) 1 3 on M 1 2 practically agree with data obtained from translational friction.
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