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Effect of poly(ethylene terephthalate) morphology on thermal cis-trans isomerization and photofading of some azo dyes: A kinetic study

✍ Scribed by Pier Luigi Beltrame; Ernestina Dubini-Paglia; Bruno Marcandalli; Patrizia Sadocco; Alberto Seves


Book ID
118281909
Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
547 KB
Volume
33
Category
Article
ISSN
0021-8995

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πŸ“œ SIMILAR VOLUMES


Thermal cis-trans isomerization and phot
✍ Ernestina Dubini-Paglia; Pier Luigi Beltrame; Bruno Marcandalli; Paolo Carniti; πŸ“‚ Article πŸ“… 1986 πŸ› John Wiley and Sons 🌐 English βš– 535 KB

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 20-60Β°C. Kinetic behavior i

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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

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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