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 language | English (US) |
|---|---|
| Pages (from-to) | 2082-2086 |
| Number of pages | 5 |
| Journal | Macromolecules |
| Volume | 22 |
| Issue number | 5 |
| DOIs | |
| State | Published - Sep 1 1989 |
| Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry