info:eu-repo/semantics/article
Optimization of a photopolymerizable material based on a photocyclic initiating system using holographic recording
Fecha
2012-11Registro en:
Ibrahim, A.; Ley, C.; Allonas, X.; Tarzi, Olga Inés; Chan Yong, A.; et al.; Optimization of a photopolymerizable material based on a photocyclic initiating system using holographic recording; Royal Society of Chemistry; Photochemical and Photobiological Sciences; 11; 11; 11-2012; 1682-1690
1474-905X
CONICET Digital
CONICET
Autor
Ibrahim, A.
Ley, C.
Allonas, X.
Tarzi, Olga Inés
Chan Yong, A.
Carré, C.
Chevallier, R.
Resumen
A set of photoinitiating systems (PIS) for free radical photopolymerization was studied using time-resolved spectroscopic experiments, real-time FTIR and holographic recording. It is shown that the efficiency of the photoinitiating system can be drastically increased when a redox additive is added to the conventional dye/coinitiator system by virtue of photocyclic behaviour. The homogeneous photopolymerization process was found to reach a fast vitrification, limiting the conversion at about 55%. By contrast, holographic recording underlines the differences in photoinitiating system reactivity, allowing diffraction efficiencies close to unity for the most reactive PIS.