NIR Sensitizer Operating under Long Wavelength (1064 nm) for Free Radical Photopolymerization Processes.
NIR irradiation
NIR sensitizers
free radical polymerization
long wavelength irradiation
Journal
Macromolecular rapid communications
ISSN: 1521-3927
Titre abrégé: Macromol Rapid Commun
Pays: Germany
ID NLM: 9888239
Informations de publication
Date de publication:
Aug 2020
Aug 2020
Historique:
received:
26
05
2020
revised:
23
06
2020
pubmed:
9
7
2020
medline:
28
11
2020
entrez:
9
7
2020
Statut:
ppublish
Résumé
Free radical polymerization upon near-infrared (NIR) light is still the subject of intense research efforts and remains a huge challenge particularly for long wavelengths (>1000 nm). In this study, a NIR sensitizer operating upon long wavelength (1064 nm) is proposed for an efficient polymerization of acrylate monomers. A new three-component photoinitiating system is developed comprising the NIR sensitizer in combination with an Iodonium salt (Iod) and an amine. Remarkably, the NIR sensitizer (IR 1064) absorbing strongly in all the near infrared region (700-1200 nm) offers the possibility to use a broad range of irradiation wavelengths, i.e., examples are provided at 785 and 1064 nm. Such long wavelengths are characterized by many advantages such as a deeper penetration of light and therefore a better curing of the monomer but it is also much safer than UV light. Excellent performance is observed for the three-component IR 1064/Iod/Amine system under air: high conversion of acrylate functions associated with a fast polymerization time. The use of IR 1064 as NIR sensitizer with a broad NIR absorption is-to the best of current knowledge-never proposed in the literature. The photoinitiating performances are studied using real-time Fourier transform infrared spectroscopy.
Identifiants
pubmed: 32638497
doi: 10.1002/marc.202000289
doi:
Substances chimiques
Acrylates
0
Amines
0
Free Radicals
0
acrylic acid
J94PBK7X8S
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2000289Subventions
Organisme : SATT Conectus Alsace
Informations de copyright
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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