Water soluble 3-mono-O-ethyl cellulose : Synthesis and characterization

SummaryThe synthesis of 3-mono-O-ethyl cellulose (EC) via 2,6-di-O-thexyldimethylsilyl cellulose was studied. Treatments with tetrabutylammonium fluoride trihydrate lead to the complete cleavage of the protective group. The structure of the polymer was confirmed by means of one- and two dimensional...

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Veröffentlicht in:	Polymer bulletin (Berlin, Germany) Germany), 2006-05, Vol.57 (1), p.33-41
Hauptverfasser:	KOSCHELLA, Andreas, FENN, Dominik, HEINZE, Thomas
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cellulose and derivatives Ethyl cellulose Exact sciences and technology Gelation Natural polymers NMR spectroscopy Physicochemistry of polymers Protective structures Solubility Synthesis Water chemistry
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Zusammenfassung:	SummaryThe synthesis of 3-mono-O-ethyl cellulose (EC) via 2,6-di-O-thexyldimethylsilyl cellulose was studied. Treatments with tetrabutylammonium fluoride trihydrate lead to the complete cleavage of the protective group. The structure of the polymer was confirmed by means of one- and two dimensional NMR spectroscopy. 3-mono-O-EC is soluble both in aprotic-dipolar organic media and water and shows thermoreversible gelation. A gelation temperature of 58.5 °C was found, which is about 30 °C higher than the cloud point temperature of conventional water soluble EC.
ISSN:	0170-0839 1436-2449
DOI:	10.1007/s00289-006-0534-2