Preparation and liquid crystalline properties of (acetyl)(ethyl)cellulose

Jian Xin Guo, Derek G. Gray

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

(Acetyl)(ethyl)cellulose (AEC) samples with a range of acetyl contents were made from (ethyl)cellulose (EC) with a degree of substitution of 2.5. The products formed cholesteric liquid crystals in chloroform, dichloromethane, aqueous phenol, m-cresol, dichloroacetic acid, and acetic acid. The acetyl degree of substitution (DS) ranged from 0.0 to 0.5 and strongly influenced the thermal behavior of the polymers in the solid state, with the higher acetyl DS giving higher melting points and heats of fusion. The AEC liquid crystals with high acetyl contents in chloroform, m-cresol, aqueous phenol, and acetic acid were right-handed cholesterics, in contrast to the handedness of the original unsubstituted EC in the same solvents. However, in dichloroacetic acid, both AEC and EC were right-handed.

Original languageEnglish (US)
Pages (from-to)2082-2086
Number of pages5
JournalMacromolecules
Volume22
Issue number5
StatePublished - May 1989
Externally publishedYes

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Cellulose
Dichloroacetic Acid
Dichloroacetic acid
Crystalline materials
Substitution reactions
Liquids
Chloroform
Chlorine compounds
Phenol
Acetic acid
Acetic Acid
Phenols
Cholesteric liquid crystals
Liquid Crystals
Methylene Chloride
Dichloromethane
Liquid crystals
Melting point
Polymers
Fusion reactions

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Preparation and liquid crystalline properties of (acetyl)(ethyl)cellulose. / Guo, Jian Xin; Gray, Derek G.

In: Macromolecules, Vol. 22, No. 5, 05.1989, p. 2082-2086.

Research output: Contribution to journalArticle

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