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Rheological Behavior of Polyelectrolytes Based on Cellulose and Ionic Liquids Dissolved in 1-Ethyl-3-methyl Imidazolium Acetate

✍ Scribed by Nina Gonsior; Helmut Ritter

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
804 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The regioselective derivatization of cellulose with three different ionic liquids via click chemistry is investigated. The novel polyelectrolytes are characterized in detail by elemental analysis, FT‐IR‐spectroscopy, and ^1^H and ^13^C‐NMR spectroscopy. In addition, the rheological behavior of the compounds is studied in 1‐ethyl‐3‐methyl imidazolium acetate as the solvent. A Newtonian flow behavior is recorded for all cellulose samples at a concentration of 5 wt%. Due to the modification, the viscosity is reduced by at least one decade compared to unmodified cellulose and can be further controlled by choice of the substituent of the imidazolium ring. Furthermore, the viscosity‐temperature dependence is analyzed with the Vogel–Fulcher–Tammann equation and the Arrhenius plot.

📜 SIMILAR VOLUMES

Raman and ab initio study of the conform
Raman and ab initio study of the conformational isomerism in the 1-ethyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide ionic liquid
✍ J. C. Lassègues; J. Grondin; R. Holomb; P. Johansson 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 339 KB

The calculated and experimental Raman spectra of the (EMI + )TFSI -ionic liquid, where EMI + is the 1-ethyl-3-methylimidazolium cation and TFSI -the bis(trifluoromethanesulfonyl)imide anion, have been investigated for a better understanding of the EMI + and TFSI -conformational isomerism as a functi