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Titre du document / Document title

The formation of a lyotropic mesophase in aqueous solutions of the sodium salt of cellulose acetate sulfate

Auteur(s) / Author(s)

GRINSHPAN D. D. (1) ; TSYGANKOVA N. G. (1) ; TRET'YAKOVA S. M. (1) ; SAVITSKAYA T. A. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Research Institute of Physicochemical Problems, Belarussian State University, ul. Leningradskava 14, Minsk, 220080, BELARUS

Résumé / Abstract

Aqueous solutions of the sodium salt of cellulose acetate sulfate are shown to be isotropic at concentrations below 42 wt %, biphasic in the concentration range 42-52 wt % in which the isotropic phase-anisotropic phase transition is partially accomplished, and liquid-crystalline at a concentration of higher 52 wt %. The anisotropic phase is represented by different ordered supramolecular structures, such as individual spherulites, spherulite ribbons, fingerprint structures, and other more complex entities. Rheological curves typical of LC systems were recorded; the corresponding concentration and temperature dependences of shear viscosity also prove the existence of an LC state in aqueous solutions of the cellulose acetate sulfate sodium salt. The critical concentration corresponding to the transition of the sodium salt of cellulose acetate sulfate to the LC state at 293-323K was estimated at 52-52.5 wt %.

Revue / Journal Title

Polymer science. Series B    ISSN  1560-0904 

Source / Source

2002, vol. 44, no1-2, pp. 23-26 [4 page(s) (article)] (11 ref.)

Langue / Language

Anglais

Editeur / Publisher

Pleiades, New York, NY, ETATS-UNIS  (1995) (Revue)

Mots-clés anglais / English Keywords

Experimental study

;

Concentration effect

;

Shear viscosity

;

Aqueous solution

;

Lyotropic state

;

Liquid crystal polymers

;

Organic sulfate

;

Polyelectrolyte

;

Cellulose mixed ester

;

Mots-clés français / French Keywords

Cellulose acétosulfate

;

Etude expérimentale

;

Effet concentration

;

Viscosité cisaillement

;

Solution aqueuse

;

Etat lyotrope

;

Polymère cristal liquide

;

Sulfate organique

;

Polyélectrolyte

;

Cellulose ester mixte

;

Mots-clés espagnols / Spanish Keywords

Estudio experimental

;

Efecto concentración

;

Viscosidad cizalla

;

Solución acuosa

;

Estado liotrópico

;

Sulfato orgánico

;

Polielectrolito

;

Celulosa ester mixto

;

Localisation / Location

INIST-CNRS, Cote INIST : 3132 B, 35400011284792.0070

Nº notice refdoc (ud4) : 15106672



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