Abstract
Degradation of cellulose derivatives (hydroxyethyl ether and hydroxypropylmethyl ether) in water in the presence of chromic acid was investigated viscometrically. The degradation was followed by determination of the change in the apparent viscosity of the solution with a Brookfield viscometer and the change in the intrinsic viscosity with an Ubbelohde viscometer. It was found that the viscosity decreased with time and the rate of viscosity reduction decreased with the decrease in the molecular weight. It was confirmed by the determination of the change in the intrinsic viscosity that the decrease in the apparent viscosity was due to the random degradation of the polymers. A linear relationship was found between the change in the reciprocal of molecular weight of polymers and the change in the concentration of hexavalent chrome in the solution, which indicates that the degradation proceeds via a random oxidative-degradation process.
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Sato, T., Katila, D. Oxidative Degradation of Cellulose Derivatives In Aqueous Solution of Chromic Acid. Polym J 10, 433–436 (1978). https://doi.org/10.1295/polymj.10.433
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DOI: https://doi.org/10.1295/polymj.10.433
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