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. 2020 Apr 28;25(9):2063. doi: 10.3390/molecules25092063

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Polymerization profiles (epoxy function conversion vs. irradiation time) for thin epoxy-silicone films (thickness = 25 μm) under air, upon irradiation with the LED@405 nm, using different two-component photoinitiating systems: (A) PI/IOD (0.05%/1% w/w): (1–8) Coumarin 1-Coumarin 8/IOD; (9) Com. Coum 2/IOD and (10) Com. Coum 4/IOD, respectively. (B) PI/IOD (0.1%/1% w/w): (1–8) coumarin 1-Coumarin 8/IOD; (9) Com. Coum 2/IOD; (10) Com. Coum 4/IOD; (11) CPTX/IOD and (12) DBA/IOD, respectively. The irradiation starts at t = 10 s.