Skip to Main content Skip to Navigation
Journal articles

New violet to yellow light sensitive diketo pyrrolo-pyrrole photoinitiators: high performance systems with unusual bleaching properties and solubility in water

Abstract : Eleven diketo pyrrolo-pyrrole (DKPP) derivatives have been synthesized as new high performance photo-initiators and combined with various additives to initiate the free radical polymerization of methacrylates in thin and thick films under visible violet, blue, green, and yellow light irradiation (e.g. LEDs at 405 nm, 470 nm, 477 nm, 520 nm or 565 nm) both in laminate or under air; under red light (@ 635 nm), their performance is lower. Compared to the well-known camphorquinone or Eosin based systems, most of the novel DKPP based photoinitiating systems exhibit much higher efficiencies. The photopolymerization of thick films (1.4 mm) under air is also feasible. Most of these DKPP structures exhibited excellent bleaching properties and can also be used in water-borne formulations. The photochemically generated reactive species have been investigated by steady state photolysis, cyclic voltammetry, fluorescence, laser flash photolysis and electron spin resonance spin trapping techniques.
Document type :
Journal articles
Complete list of metadatas

https://hal-amu.archives-ouvertes.fr/hal-01774205
Contributor : Marlene Delhaye <>
Submitted on : Monday, April 23, 2018 - 2:42:30 PM
Last modification on : Thursday, July 9, 2020 - 1:12:03 PM

Identifiers

Collections

Citation

Mariem Bouzrati-Zerelli, Nicolas Zivic, Frederic Dumur, Didier Gigmes, Bernadette Graff, et al.. New violet to yellow light sensitive diketo pyrrolo-pyrrole photoinitiators: high performance systems with unusual bleaching properties and solubility in water. Polymer Chemistry, Royal Society of Chemistry - RSC, 2017, 8 (13), pp.2028--2040. ⟨10.1039/c7py00202e⟩. ⟨hal-01774205⟩

Share

Metrics

Record views

96