TY - JOUR
T1 - UV-violet-blue LED induced polymerizations
T2 - specific photoinitiating systems at 365, 385, 395 and 405 nm
AU - Zhang, Jing
AU - Zivic, Nicolas
AU - Dumur, Frédéric
AU - Xiao, Pu
AU - Graff, Bernadette
AU - Fouassier, Jean Pierre
AU - Gigmes, Didier
AU - Lalevée, Jacques
PY - 2014/12/15
Y1 - 2014/12/15
N2 - Two naphthalimide derivatives (DMAENs) containing tertiary amine groups have been designed and synthesized. Upon exposure to near UV and visible LEDs (365 nm-455 nm), they lead to radicals without adding a hydrogen donor and, in combination with 2,4,6-tris(trichloromethyl)-1,3,5-triazine, an iodonium salt or N-vinylcarbazole, they produce radicals and cations. Compared to the well-known camphorquinone or bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide photoinitiator, the novel DMAENs containing photoinitiating systems are characterized by a very high reactivity for both the free radical polymerization of acrylates and the cationic polymerization of epoxides. This outstanding performance paves the way for polymerization in soft conditions (e.g. upon LED irradiation). The photochemical mechanisms are studied by Molecular Orbitals MO calculations, steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping and laser flash photolysis techniques.
AB - Two naphthalimide derivatives (DMAENs) containing tertiary amine groups have been designed and synthesized. Upon exposure to near UV and visible LEDs (365 nm-455 nm), they lead to radicals without adding a hydrogen donor and, in combination with 2,4,6-tris(trichloromethyl)-1,3,5-triazine, an iodonium salt or N-vinylcarbazole, they produce radicals and cations. Compared to the well-known camphorquinone or bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide photoinitiator, the novel DMAENs containing photoinitiating systems are characterized by a very high reactivity for both the free radical polymerization of acrylates and the cationic polymerization of epoxides. This outstanding performance paves the way for polymerization in soft conditions (e.g. upon LED irradiation). The photochemical mechanisms are studied by Molecular Orbitals MO calculations, steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping and laser flash photolysis techniques.
KW - LEDs
KW - Naphthalimide derivatives
KW - Near
KW - Photoinitiator
KW - UV and visible
UR - http://www.scopus.com/inward/record.url?scp=84914101746&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2014.11.002
DO - 10.1016/j.polymer.2014.11.002
M3 - Article
AN - SCOPUS:84914101746
VL - 55
SP - 6641
EP - 6648
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 26
ER -