Study on lyotropic liquid crystal of ethyl-cyanoethyl cellulose

Abstract

Ethyl cyanoethyl cellulose (I) was soluble in many organic solvents and formed liquid- solns. above the crit. concentration With increasing concentration, the solution was transformed from isotropic to anisotropic state through a biphasic state. Phase separation was observed in I-dichloroacetic acid and I-trifluoroacetic acid biphasic solns. The liquid crystals could develop into a spherulitic structure. For organic acidic solvent systems, the crit. concentration decreased with increasing acidity. The crit. concentration decreased with decreasing polymer-solvent interaction parameter for most organic solvents.

Key words: CRYSTAL STRUCTURE, LIQUID CRYSTAL, HIGHPOLYMER, CRITICAL MASS, RHEOLOGICAL PROPERTY, SMALL ANGLE SCATTERING, CELLULOSE ETHERS, ETHYL CYANIDE, LIGHT SCATTERING, ETHYLCELLULOSE

CLC Number:

O631.2

Cite this article

HUANG YONG;CHEN MINGCAI;LI LISHENG. Study on lyotropic liquid crystal of ethyl-cyanoethyl cellulose[J]. Acta Chimica Sinica, 1988, 46(4): 367-371.

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