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Polymer-solvent effects in cellulose urethane and methyl cellulose urethane solutions

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Abstract

The polymer-solvent interaction was studied for two similar cellulose derivatives in the semi-dilute concentration range by static and dynamic light scattering. The trisubstituted 3-chlorophenyl carbamate (3Cl-CTC) and a mixed trisubstituted derivative with methyl groups (degree of methyl substituents: DS Me = 1.6–1.7)combined with the abovementioned 3-chlorophenyl carbamate groups filling the still open positions at the cellulose backbone were synthesized, fractionated and characterized according to standard methods. Different kinds of associations, entangled clusters with a rod-like shape on one side and entanglement networks on the other side, exist in semi-dilute dioxane solutions caused by different polymer-solvent interactions. These quite different associations lead to either a liquid crystalline or a gel-like state upon increase of concentration.

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Authors and Affiliations

  1. Institut für Physikalische Chemie, Technische Universität Clausthal, Arnold-Sommerfeld-Str. 4, D-38678, Clausthal-Zellerfeld, Germany

    E. Klohr & P. Zugenmaier

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  1. E. Klohr
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  2. P. Zugenmaier
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Klohr, E., Zugenmaier, P. Polymer-solvent effects in cellulose urethane and methyl cellulose urethane solutions. Cellulose 1, 259–280 (1994). https://doi.org/10.1007/BF00812509

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