Triazine-Based Type-II Photoinitiating System for Free Radical Photopolymerization: Mechanism, Efficiency, and Modeling - Université Clermont Auvergne Access content directly
Journal Articles Macromolecular Chemistry and Physics Year : 2017

Triazine-Based Type-II Photoinitiating System for Free Radical Photopolymerization: Mechanism, Efficiency, and Modeling

Abstract

Isopropylthioxanthone, a versatile photoinitiator (PI) for free radical photopolymerization (FRP), is combined with a triazine derivative (Tz) in a Type‐II photoinitiating system (PIS). Initiation ability of this system for acrylate photopolymerization is assessed using a diacrylate monomer. Involvement of a photoinduced electron transfer mechanism is demonstrated by time‐resolved spectroscopic measurements. Further insights in this mechanism are obtained through the use of a photopolymerization kinetic model taking into account the main reaction steps from the absorption of photons to the formation of the polymer. Prediction ability of the model is also tested with different initial concentrations of PI and co‐initiator, as well as a different Tz. This last experiment reveals the noticeable role of back electron transfer in the FRP mechanism of Type‐II PIS.
Fichier principal
Vignette du fichier
20170215 Tz publication_revisedJC_HAL.pdf (1.22 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03027461 , version 1 (27-11-2020)

Licence

Attribution

Identifiers

Cite

Julien Christmann, Xavier Allonas, Christian Ley, Ahmad Ibrahim, Céline Croutxe-Barghorn. Triazine-Based Type-II Photoinitiating System for Free Radical Photopolymerization: Mechanism, Efficiency, and Modeling. Macromolecular Chemistry and Physics, 2017, 218 (18), pp.1600597. ⟨10.1002/macp.201600597⟩. ⟨hal-03027461⟩
33 View
129 Download

Altmetric

Share

Gmail Facebook X LinkedIn More