CIHIDECAR 12529
CENTRO DE INVESTIGACIONES EN HIDRATOS DE CARBONO
Unidad Ejecutora - UE
artículos
Título:
Optimization of a photopolymerizable material based on a photocyclic initiating system using holographic recording
Autor/es:
A. IBRAHIM; C. LEY; X. ALLONAS; O. I. TARZI; A. CHAN YONG; C. CARRÉ; R. CHEVALLIER
Revista:
Photochemical and Photobiological Sciences
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; Año: 2012 vol. 11 p. 1682 - 1690
ISSN:
1474-905X
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.
