Increasing the stability of cellulose dissolved in cuprammonium hydroxide

✍ Scribed by A. Kantouch; I. Géczy

• Publisher: Elsevier Science
• Year: 1965
• Tongue: English
• Weight: 276 KB
• Volume: 1
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(65)90038-8

✦ Synopsis

The cupri-ethylenediamine and the modified cuoxam methods used in measuring the degree of polymerization of cellulose are reviewed.

A comparative study of the degradation of cellulose in these solvents has been undertaken. The accuracies of measurements by using these methods and a new modified cuoxam method are undertaken.

The addition of sodium sulphite and sodium bisulphite to the cuoxam solution in amounts of 0-6-I "4 g/50 ml protects cellulose against oxidation during the dissolving process. This modified cuoxam method can be compared in its accuracy to the cupri-ethylenediamine method where the change in the viscosity of cellulosic solutions during the measuring process is negligible.