TY - JOUR
T1 - Highly conjugated visible and near-infrared light photoinitiating systems for radical and cationic polymerizations
AU - Suerkan, Ali
AU - Alkan, Ecem Aydan
AU - Kaya, Kerem
AU - Udum, Yasemin Arslan
AU - Toppare, Levent
AU - Yagci, Yusuf
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/5
Y1 - 2021/5
N2 - In this communication, we report highly conjugated thiophenes having [1,2,5]-thiadiazolo and [1,2,5]-selenadiazolo [3,4-f]-benzo [1,2,3] triazole in conjunction with diphenyliodonium hexafluorophosphate salt (DPI) as new visible and near-infrared light (NIR) photoinitiator systems for free radical (FRP) and cationic polymerizations (CP). The postulated mechanism is based on the electron transfer reactions between the excited conjugated molecule and DPI ions. The radicals and Bronsted acid formed this way initiate FRP and CP of appropriate monomers such as methylacrylate (MA), methyl methacrylate (MMA), triethylene glycol dimethacrylate (TEGDMA) and cyclohexene oxide (CHO), isobutyl vinylether (IBVE) respectively. The possibility of in situ hybrid polymerization is also demonstrated using bifunctional monomer glycidyl methacrylate (GMA).
AB - In this communication, we report highly conjugated thiophenes having [1,2,5]-thiadiazolo and [1,2,5]-selenadiazolo [3,4-f]-benzo [1,2,3] triazole in conjunction with diphenyliodonium hexafluorophosphate salt (DPI) as new visible and near-infrared light (NIR) photoinitiator systems for free radical (FRP) and cationic polymerizations (CP). The postulated mechanism is based on the electron transfer reactions between the excited conjugated molecule and DPI ions. The radicals and Bronsted acid formed this way initiate FRP and CP of appropriate monomers such as methylacrylate (MA), methyl methacrylate (MMA), triethylene glycol dimethacrylate (TEGDMA) and cyclohexene oxide (CHO), isobutyl vinylether (IBVE) respectively. The possibility of in situ hybrid polymerization is also demonstrated using bifunctional monomer glycidyl methacrylate (GMA).
KW - Cationic polymerization
KW - Conjugated molecules
KW - Near-infrared sensitization
KW - Onium salts
KW - Photo-induced electron transfer
KW - Radical polymerization
UR - http://www.scopus.com/inward/record.url?scp=85101013555&partnerID=8YFLogxK
U2 - 10.1016/j.porgcoat.2021.106189
DO - 10.1016/j.porgcoat.2021.106189
M3 - Article
AN - SCOPUS:85101013555
SN - 0300-9440
VL - 154
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
M1 - 106189
ER -