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Acid decomposition of highly substituted cellulose xanthate
Author(s) -
Törnell B.
Publication year - 1968
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1968.070120917
Subject(s) - xanthate , viscose , cellulose , decomposition , chemistry , inorganic chemistry , molecule , macromolecule , dissociation (chemistry) , dissociation constant , polymer chemistry , organic chemistry , biochemistry , receptor
The acid decomposition of cellulose xanthate was studied spectrophotometrically with a stopped‐flow technique. The reactivity of the xanthate groups was found to decrease with an increase in the viscose γ number. This was explained by the occurrence of stabilizing interactions exerted between closely spaced xanthate groups. With uniformly substituted xanthates this effect began to be noticeable at γ numbers above 50. At higher γ numbers partial decomposition by acid resulted in an uneven distribution of xanthate groups along the chain molecules. Another feature of cellulose xanthate is that the degree of dissociation at constant acid concentration decreases with an increase in the γ number. This can be ascribed to variations in the dielectric constant inside the macromolecules.