Five polypropylene films were prepared having different crystallinity and morphology, the latter having been modified by stretching. They were colored with azo dyes XC6H4N=N&H4N(C,H5), (where X=H, OCH,, CN, and NO,). The kinetics of the thermal cis-trans isomerization of these dyes has been studied
Influence of polycaprolactam morphology on thermal cis–trans isomerization and photofading of azo dyes differently dispersed in it: A kinetic study
✍ Scribed by Ernestina Dubini-Paglia; Pier Luigi Beltrame; Bruno Marcandalli; Alberto Seves
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Volume
- 41
- Category
- Article
- ISSN
- 0021-8995
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📜 SIMILAR VOLUMES
The thermal cis-trans isomerization of azo dyes XC6H4N=NC6H4N(C2H5)2 (where X is H, OCH3, CN, and NOz) in poly(ethy1ene terephthalate) matrices, below the glass transition temperature, and in dibutylphthalate solutions has been studied kinetically in the temperature range 20-60°C. Kinetic behavior i
Azo dyes when irradiated by visible light undergo transcis isomerization, after which the cis form reverts progressively to the thermodynamically more stable trans isomer following a photochemical or thermal path.'-5 For a given dye, the cis-trans isomerization proceeds in different ways depending o