Effect of degree of acetylation and solvent on the chiroptical properties of lyotropic (acetyl) (ethyl) cellulose solutions

Jian Xin Guo, D. G. Gray

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Polymers of (Acetyl) (ethyl) cellulose (AEC) with ethyl degree of substitution (DS) of 2.5 and acetyl DS ranging from 0 to 0.5 dissolve readily in a wide range of organic solvents and form chiral nematic liquid crystalline phases in concentrated solution. The chiroptical properties of these liquid crystal are strongly influenced by the acetyl content and solvent. In dichloromethane and other acids, the AEC lyotrophic mesophases all show a handedness inversion as the acetyl DS of the polymers is increased, changing from left-to-right handed supermolecular helicoidal structures. In dichloroacetic acid, AEC liquid crystals remain right-handed, independent of the acetyl DS.

Original languageEnglish (US)
Pages (from-to)2529-2537
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume32
Issue number15
StatePublished - Jan 1 1994
Externally publishedYes

Fingerprint

acetylation
Acetylation
cellulose
Cellulose
Substitution reactions
substitutes
Liquid Crystals
Liquid crystals
Polymers
Dichloroacetic Acid
Dichloroacetic acid
liquid crystals
handedness
acids
Methylene Chloride
Dichloromethane
polymers
Organic solvents
inversions
Crystalline materials

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

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abstract = "Polymers of (Acetyl) (ethyl) cellulose (AEC) with ethyl degree of substitution (DS) of 2.5 and acetyl DS ranging from 0 to 0.5 dissolve readily in a wide range of organic solvents and form chiral nematic liquid crystalline phases in concentrated solution. The chiroptical properties of these liquid crystal are strongly influenced by the acetyl content and solvent. In dichloromethane and other acids, the AEC lyotrophic mesophases all show a handedness inversion as the acetyl DS of the polymers is increased, changing from left-to-right handed supermolecular helicoidal structures. In dichloroacetic acid, AEC liquid crystals remain right-handed, independent of the acetyl DS.",
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T1 - Effect of degree of acetylation and solvent on the chiroptical properties of lyotropic (acetyl) (ethyl) cellulose solutions

AU - Guo, Jian Xin

AU - Gray, D. G.

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N2 - Polymers of (Acetyl) (ethyl) cellulose (AEC) with ethyl degree of substitution (DS) of 2.5 and acetyl DS ranging from 0 to 0.5 dissolve readily in a wide range of organic solvents and form chiral nematic liquid crystalline phases in concentrated solution. The chiroptical properties of these liquid crystal are strongly influenced by the acetyl content and solvent. In dichloromethane and other acids, the AEC lyotrophic mesophases all show a handedness inversion as the acetyl DS of the polymers is increased, changing from left-to-right handed supermolecular helicoidal structures. In dichloroacetic acid, AEC liquid crystals remain right-handed, independent of the acetyl DS.

AB - Polymers of (Acetyl) (ethyl) cellulose (AEC) with ethyl degree of substitution (DS) of 2.5 and acetyl DS ranging from 0 to 0.5 dissolve readily in a wide range of organic solvents and form chiral nematic liquid crystalline phases in concentrated solution. The chiroptical properties of these liquid crystal are strongly influenced by the acetyl content and solvent. In dichloromethane and other acids, the AEC lyotrophic mesophases all show a handedness inversion as the acetyl DS of the polymers is increased, changing from left-to-right handed supermolecular helicoidal structures. In dichloroacetic acid, AEC liquid crystals remain right-handed, independent of the acetyl DS.

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