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Photoinitiation study of Irgacure 784 in an epoxy resin photopolymer
Sabol, Dušan; Gleeson, M. R.; Liu, Shui; Sheridan, John T.
A deeper understanding of the processes, which occur during free radical photopolymerization, is necessary in order to develop a fully comprehensive model, which represents their behavior during exposure. One of these processes is photoinitiation, whereby a photon is absorbed by a photosensitizer producing free radicals, which can initiate polymerization. These free radicals can also participate in polymer chain termination (primary termination), and it is therefore necessary to understand their generation in order to predict the temporally varying kinetic effects present during holographic grating formation. In this paper, a study of the photoinitiation mechanisms of Irgacure 784 photosensitizer, in an epoxy resin matrix, is presented. We report our experimental results and present a theoretical model to predict the physically observed behavior. Science Foundation Ireland Irish Research Council for Science, Engineering and Technology Enterprise Ireland
Keyword(s): Free radical reactions; Photopolymerization; Diffraction gratings; Polymers
Publication Date:
Type: Journal article
Peer-Reviewed: Unknown
Language(s): English
Institution: University College Dublin
Publisher(s): American Institute of Physics (AIP)
File Format(s): other; application/pdf
First Indexed: 2012-08-25 05:17:03 Last Updated: 2018-10-11 16:18:12