Optimization of a photopolymerizable material based on a photocyclic initiating system using holographic recordingReport as inadecuate




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* Corresponding author 1 LPIM - Laboratoire de Photochimie et d-Ingénierie Macromoléculaires 2 FOTON - Fonctions Optiques pour les Technologies de l-informatiON 3 Mines Douai EMD - École des Mines de Douai

Abstract : 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.

Keywords : holographic recording photocyclic initiating system Photopolymerizable systems





Author: Ahmad Ibrahim - Christian Ley - Xavier Allonas - Olga Tarzi - Aurélie Chan Yong - Christiane Carré - Raymond Chevallier -

Source: https://hal.archives-ouvertes.fr/



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