Photopolymerization of methyl methacrylate initiated by thioxanthone derivatives : photoinitiation mechanism

The photopolymerization of methyl methacrylate initiated by substituted thioxanthones in the presence of an amine has been investigated. The dependence of the polymerization rates with the amine concentration and the photoinitiation efficiency at a given amine concentration are highly dependent on t...

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Veröffentlicht in:Polymer (Guilford) 2000-12, Vol.41 (26), p.9103-9109
Hauptverfasser: CORRALES, T, PEINADO, C, CATALINA, F, NEUMANN, M. G, ALLEN, N. S, RUFS, A. M, ENCINAS, M. V
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Sprache:eng
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Zusammenfassung:The photopolymerization of methyl methacrylate initiated by substituted thioxanthones in the presence of an amine has been investigated. The dependence of the polymerization rates with the amine concentration and the photoinitiation efficiency at a given amine concentration are highly dependent on the ketone structure. The reactivity of the ketone is also highly dependent on the ketone structure. The values of the quenching rate constants show that the initiation efficiency is controlled by the competition between the quenching of the excited states by the monomer and also the amine. (Original abstract - amended)
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(00)00292-5