Relative sensitization efficiency of fluorescent probes/sensitizers for monitoring and acceleration of cationic photopolymerization of monomers |
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| Institution: | 1. Cracow University of Technology, Faculty of Chemical Engineering and Technology, Warszawska 24, 31-155 Kraków, Poland;2. Jagiellonian University, Department of Chemistry, Ingardena 3, 30-060 Kraków, Poland;3. Photo High Technologies Ltd., Bobrzyńskiego 14, 30-348 Kraków, Poland;1. Département Physique et Mécanique des Matériaux, Institut Pprime CNRS-ENSMA-Université de Poitiers UPR 3346, ISAE-ENSMA, 1 Avenue Clément Ader, 86961 Futuroscope, Chasseneuil, France;2. UET DEA-TC-AC, Technocentre Renault, Les Labos, 1 Avenue du Golf, 78288 Guyancourt, France;1. Laboratoire de Photochimie et d’Ingénierie Macromoléculaires, ENSCMu, 3 rue Alfred Werner, 68093 Mulhouse Cedex, France;2. Faculty of Chemical Technology, Poznan University of Technology, Pl. M. Sklodowskiej-Curie, 60-965 Poznan, Poland;1. Institute of Experimental Physics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland;2. Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Seminaryjna 3, 85-326 Bydgoszcz, Poland;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China;2. College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China;3. Anqing Research Institute, Beijing University of Chemical Technology, Anqing, 246000, People’s Republic of China;4. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China;5. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, (Beijing-University of Chemical Technology), Beijing-100029, People''s Republic of China |
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| Abstract: | The performance of a series of 1-amino-2,6-dicyano-3,5-diphenylbenzene derivatives (i.e., meta-terphenyls) as fluorescent molecular probes for monitoring cationic photopolymerization of monomers by the Fluorescence Probe Technique (FPT) was studied. It was found that the m-terphenyls accelerate the cationic photopolymerization initiated with diphenyliodonium photoinitiators at the wavelength where the photoinitiator alone does not work. Consequently, application of the m-terphenyls in a dual role: (a) as fluorescent probes for monitoring the cationic polymerization progress, and (b) as long-wavelength sensitizers for diphenyliodonium photoinitiators is proposed. Next, a precise method for determination of relative sensitization efficiency of the sensitizers has been devised and applied for evaluation of the performance of the m-terphenyl sensitizers in comparison to that of a commercial sensitizer: 2,4-diethyl-9H-thioxanthen-9-one. |
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| Keywords: | Cationic photopolymerization Fluorescent probes Sensitizers FPT Testing method |
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