Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 40, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201900047
Keywords
cationic polymerization; near infrared; photopolymerization; titanocene; upconverting nanoparticles
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Funding
- National Nature Science Foundation of China [51673086, 21404048]
- Fundamental Research Funds for the Central Universities [JUSRP 51719A]
- National First-class Discipline Program of Food Science and Technology [JUFSTR20180301]
- Jiangsu Province, China through the International Collaboration program (MOE, 111 Project) [B13025]
- Jiangsu Province, China through the International Collaboration program (SAFEA, 111 Project) [B13025]
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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 abstract hydrogen or add to the monomer, forming electron donor radicals that can be oxidized by iodonium salt to initiate cationic polymerization.
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