Zinc-based metal complexes as new photocatalysts in polymerization initiating systems

Mohamad Ali Tehfe (1) , Frédéric Dumur (2) , Sofia Telitel (3) , Didier Gigmes (2) , Emmanuel Contal (2) , Denis Bertin (2) , Fabrice Morlet-Savary (3) , Bernadette Graff (3) , Jean Pierre Fouassier (3) , Jacques Lalevée (3)

1 LPIM - Laboratoire de Photochimie et d'Ingénierie Macromoléculaires
2 ICR - Institut de Chimie Radicalaire
3 IS2M - Institut de Science des Matériaux de Mulhouse

Zinc-based metal complexes (ZnC) are proposed as original photoinitiators in multi-component systems for the formation of free radicals under visible light irradiation. The ZnC/ iodonium salt/additive three-component systems (where the additive can be a silane or a divinyl ether) present an excellent ability to promote either the free radical polymerization of an acrylate, the cationic polymerization of a divinyl ether and the polymerization of acrylate/vinyl ether blends under very soft irradiations (e.g. halogen lamp irradiation) or laser diodes (457 or 532 nm) exposure. The mechanisms are investigated by photolysis, luminescence and ESR experiments.

Mots clés: Photocatalysts; Zinc complex (ZnC); Silane; Divinyl ether; Free radical polymerization; Cationic photopolymerization (ROP)

Domaines: Matériaux

Mohamad Ali Tehfe, Frédéric Dumur, Sofia Telitel, Didier Gigmes, Emmanuel Contal, et al.. Zinc-based metal complexes as new photocatalysts in polymerization initiating systems. European Polymer Journal, 2013, 49, pp.1040-1049. ⟨10.1016/j.eurpolymj.2013.01.023⟩. ⟨hal-01020189⟩