| Titre : |
Photocuring activity of several commercial, near UV activated photoinitiators in clear and pigmented systems |
| Type de document : |
texte imprimé |
| Auteurs : |
J. Segurola, Auteur ; N. S. Allen, Auteur ; M. Edge, Auteur ; Aitor Parrondo, Auteur ; Ian Roberts, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 61-67 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Amorceurs (chimie)
Encre
Photochimie
Rayonnement ultraviolet
Réticulation (polymérisation)
Revêtements
Spectrométrie infrarouge
Spectroscopie ultraviolette
Vernis
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Some of the most important commercial near UV photoinitiators have been analyzed by UV spectroscopy to evaluate the type of electronic transitions occurring upon absorption of light. Photocuring studies have been undertaken by real time infrared spectroscopy (RTIR) in clear and pigmented (black, magenta, cyan, and yellow) systems with UV and visible light at different photoinitiator concentrations in the presence of air. Generally, the Type I photofragmenting photoinitiators appear to operate more effectively under UV excitation when compared with the Type II thioxanthones, especially in pigmented systems. There is a reasonable correlation between the UV and visible absorption properties of the respective initiators and their overlap with the excitation source. |
| Note de contenu : |
- TYPE I PHOTOINITIATORS : Alpha-cleavage photoinitiators - Alpha-aminoalkylphenones - Acylphosphine oxides
- TYPE II PHOTOINITIATORS : Thioxanthones
- EXPERIMENTAL : Materials - UV Spectroscopy - Real time infrared spectroscopy RTIR
- RESULTS AND DISCUSSION : UV Spectroscopy results - Photopolymerization results |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17913 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 894 (07/1999) . - p. 61-67
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