Abstract
New cellulose acetate derivatives substituted with 6-(p-alkoxyphenyl)carbonyl-spirobenzopyran (COSP) were prepared from base-catalyzed etherification of cellulose acetate by 6-(p-bromohexyloxyphenyl)carbonylspirobenzopyran. The degree of COSP substitution was controlled by the feed amount of COSP and reached to max. 46 wt%. Tg of the resultant COSP bound cellulose (CA-COSP) was increased as the COSP substitution is increased. CA-COSP was soluble in aprotic polar solvents, to allow preparation of photochromic film by solution process. Reversible photochromic property was observed from the CA-COSP film by using two light sources of UV and visible light.
| Original language | English |
|---|---|
| Pages (from-to) | 51-54 |
| Number of pages | 4 |
| Journal | Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals |
| Volume | 349 |
| DOIs | |
| Publication status | Published - 2000 |
| Event | Proceedings of the Korea-Japan Joint Forum 1999 Organic Materials for Electronics and Photonics - Kyongju, South Korea Duration: 1999 Sept 9 → 1999 Sept 11 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics