DANUT BONTEA, ION SANDU, CONSTANTIN IORDACHE, AMALIA MARIA BONTEA, IOAN GABRIEL SANDU, ALINA LUCA  <br>The Rheology of Silylcellulosic Derivatives Solutions <br>Used for Tissue Regeneration. II.  Triphenylsilylcellulose

DANUT BONTEA, ION SANDU, CONSTANTIN IORDACHE, AMALIA MARIA BONTEA, IOAN GABRIEL SANDU, ALINA LUCA
The Rheology of Silylcellulosic Derivatives Solutions
Used for Tissue Regeneration. II. Triphenylsilylcellulose

Abstract:

We studied five samples of cellulose with various polymerization degrees, which were employed for the preparation of triphenylsilylcellulosic derivatives, by the reaction of cellulose with triphenylchlorosylan, in the presence of pyridine and dimethylformamide. The triphenylsilylcellulose samples were studied in solution, through Osmometry, Viscosimetry and Permeable Gel Chromatography techniques. Their behaviour in solution was studied at different temperatures, with chloroform, o-xylene and 1,1,1-trichlorethane as solvents. The Permeable Gel Chromatography studies indicated a relative polydispersity of the triphenylsilylcellulose samples, varying between 2 and 3. In previous studies, the triphenylsilylcellulose was characterized in solutions of o-xylene, chloroform and 1,1,1-trichloroethan, at 30oC, and in o-xylene, too, at a temperature range between 30 and 70oC. The characterization of its behavior in o-xylene was performed at 30oC, for triphenylsilylcellulose, while intrinsic viscosity was determined as a function of molar mass weight. Keywords: Triphenylsilylcellulose, Osmometry, Viscometry, Intrinsic viscosity

Issue: 2012, Volume 63, Issue 6

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