title: Versatility of Pyrylium Salt/Vinyl Ether Initiating System for Epoxide Dual-Cure Polymerization: Kick-Starting Effect of the Coinitiator.
abstract: Pyrylium salts combined with vinyl ethers are shown to act as new versatile dual-cure initiating systems for both photochemical and thermal initiation of oxirane monomers. The combination of both possibilities allows the curing of thick samples through photoinduced frontal polymerization. On the basis of quantum calculations and photochemical experiments, some clues are given about the reaction mechanisms involved. Interestingly, a sequential kick-starting effect is observed in the presence of vinyl ether enabling the curing of oxetane monomers. Thereby, this communication presents a short overview of potential of pyrylium salts in cationic polymerization of oxiranes.
authors.affiliation: Laboratory of Macromolecular Photochemistry and Engineering, University of Haute Alsace, 3b rue Alfred Werner, 68093, Mulhouse, France.
authors.forename: Maxime
authors.initials: M
authors.lastname: Lecompère
authors.affiliation: Laboratory of Macromolecular Photochemistry and Engineering, University of Haute Alsace, 3b rue Alfred Werner, 68093, Mulhouse, France.
authors.forename: Xavier
authors.initials: X
authors.lastname: Allonas
authors.affiliation: Mäder Research, 130 rue de la Mer Rouge, 68200, Mulhouse, France.
authors.forename: David
authors.initials: D
authors.lastname: Maréchal
authors.affiliation: Mäder Research, 130 rue de la Mer Rouge, 68200, Mulhouse, France.
authors.forename: Adrien
authors.initials: A
authors.lastname: Criqui
mesh_terms: D004852:Epoxy Compounds / Q000737:chemistry; D005027:Ethylene Oxide / Q000737:chemistry; D058105:Polymerization; D011774:Pyrvinium Compounds / Q000737:chemistry*; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D004852:Epoxy Compounds; D011774:Pyrvinium Compounds; D014753:Vinyl Compounds; C100195:vinyl ether; D005027:Ethylene Oxide
keywords: cationic polymerization; dual-cure; epoxides; kick-starting; pyrylium salt