Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 400, Issue 8, Pages 2449-2456Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-010-4570-2
Keywords
H-1 NMR; Viscose; Xanthate group distribution; Gamma value
Funding
- Austrian government
- province of lower Austria
- province of upper Austria
- province of Carinthia
- Lenzing AG
Ask authors/readers for more resources
An analytical method for determination of the xanthate group distribution on viscoses based on liquid-state NMR spectroscopy was developed. Sample preparation involves stabilization of the xanthate group by allylation followed by derivatization of the remaining free hydroxyl groups at the glucose unit. The method was applied for studying (1) the gamma-value (number of xanthate groups per 100 glucose units) of viscose, (2) the distribution of the xanthate groups on the anhydroglucose unit (AGU), and (3) changes of the xanthate group distribution during ripening. Results of the gamma-value determination are well comparable with reference methods. Elucidation of the xanthate group distribution on the AGU gives the percentage at the C-6 position and a cumulative share of the positions C-2 and C-3. During ripening, xanthate groups at C-2 and C-3 degrade first, while xanthates at C-6 decompose at a slower rate.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available