Photoinitiators for visible light polymerization

Development of new dyeing photoinitiators based on 6H-indolo[2,3-b]quinoxaline skeleton

“…Beside the thermodynamics of the electron transfer process, one should take into account the facts that the photoinitiation ability of the photoredox pair depends on the nature of the reacting partners that may generate either radical ions or neutral radicals that undergo fragmentation reactions yielding radicals and ions [7 -9]. Very often, however, the research devoted to colored photoinitiators is determined by a potential application, particularly in the area of imaging science [10], steroelithography [11], coating technology [12] or in dentistry [13].…”

Study of free radical polymerisation with dye photoinitiators containing a naphthoylenebenzimidazolone skeleton

“…Free radical‐initiated polymerisation via the intermolecular transfer process involves many steps, including the electron transfer between the excited acceptor (photoreducible dye) and the electron donor. Schemes 2 and 3 summarise processes which occur during photo‐induced free radical polymerisation in the presence of NPhGly, PhSAc and PhOAc and DMB [23].…”

Full Issue PDF

“…The bonding agents used in this study were cured by a free radical polymerization reaction and the photosensitizive initiator camphorquinone (CQ) (Taira & others, 1988;Jakubiak & Rabek, 1999). If unreacted resin monomer remains, a plasticizing effect on the polymer leads to degraded mechanical properties of the bonding agent.…”