Near‐Infrared‐Induced Cationic Polymerization Initiated by Using Upconverting Nanoparticles and Titanocene

A new near‐infrared (NIR)‐sensitized photoinitiating system for free‐radical‐promoted cationic polymerization of oxirane and vinyl monomers such as cyclohexene oxide, and n‐butyl vinyl ether (BVE), and N‐vinyl carbazole (NVC) is described. A three‐component photoinitiating system consists of upconve...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2019-05, Vol.40 (9), p.e1900047-n/a
Main Authors: Li, Zhiquan, Zhu, Junzhe, Guan, Xin, Liu, Ren, Yagci, Yusuf
Format: Article
Language:English
Subjects:
Carbazole
Carbazoles
Cationic polymerization
Cyclohexene
Electrons
Ethylene oxide
Free radicals
Irradiation
Monomers
Nanoparticles
near infrared
photopolymerization
Polymerization
Polyvinyl carbazole
Titanium
titanocene
upconverting nanoparticles
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Summary:A new near‐infrared (NIR)‐sensitized photoinitiating system for free‐radical‐promoted cationic polymerization of oxirane and vinyl monomers such as cyclohexene oxide, and n‐butyl vinyl ether (BVE), and N‐vinyl carbazole (NVC) is described. A three‐component photoinitiating system consists of upconverting nanoparticles (UCNPs), titanium‐complex free radical photoinitiator (Irgacure 784, titanocene), and diphenyl iodonium hexafluorophosphate (Ph2I+PF6 −). Upon NIR laser irradiation at 980 nm, the radicals generated from titanocene by the visible light emitted by UCNP hydrogen or add to the monomer, forming electron donor radicals that can be oxidized by iodonium salt to initiate cationic polymerization. A novel approach for near‐infrared‐sensitized photoinitiated cationic polymerization by using upconverting nanoparticles and titanocene is presented.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.201900047