Version 1
: Received: 10 July 2021 / Approved: 12 July 2021 / Online: 12 July 2021 (22:22:54 CEST)
How to cite:
Lin, J.-T.; Lalevee, J.; Cheng, D.-C. Efficacy Analysis and Kinetics of 3-Component Photopolymerization by Visible-LED/Coumarin and Enhanced by Additives of Iodonium Salt and Amine. Preprints2021, 2021070274. https://doi.org/10.20944/preprints202107.0274.v1
Lin, J.-T.; Lalevee, J.; Cheng, D.-C. Efficacy Analysis and Kinetics of 3-Component Photopolymerization by Visible-LED/Coumarin and Enhanced by Additives of Iodonium Salt and Amine. Preprints 2021, 2021070274. https://doi.org/10.20944/preprints202107.0274.v1
Lin, J.-T.; Lalevee, J.; Cheng, D.-C. Efficacy Analysis and Kinetics of 3-Component Photopolymerization by Visible-LED/Coumarin and Enhanced by Additives of Iodonium Salt and Amine. Preprints2021, 2021070274. https://doi.org/10.20944/preprints202107.0274.v1
APA Style
Lin, J. T., Lalevee, J., & Cheng, D. C. (2021). Efficacy Analysis and Kinetics of 3-Component Photopolymerization by Visible-LED/Coumarin and Enhanced by Additives of Iodonium Salt and Amine. Preprints. https://doi.org/10.20944/preprints202107.0274.v1
Chicago/Turabian Style
Lin, J., Jacques Lalevee and Da-Chun Cheng. 2021 "Efficacy Analysis and Kinetics of 3-Component Photopolymerization by Visible-LED/Coumarin and Enhanced by Additives of Iodonium Salt and Amine" Preprints. https://doi.org/10.20944/preprints202107.0274.v1
Abstract
This article presents, for the first time, the kinetics and the general conversion features of free radical polymerization (FRP) in a 3-component system (A/B/N), with [A] being the initiator, and [B] and [N] are additives, based on the proposed mechanism of Rahal et al. Higher FRP can be achieved by additives [B] and [N], via the dual function of (i) regeneration [A], and (ii) generation of extra radicals (R) via the radicals (S' and S) produced by N.The initiator (coumarin) shows a dual photo-oxidation and photo-reduction character for high efficacy. The FRP conversion efficacy (CE) depends not only on the property of the initiator [A], the additives [B] and [N}, but also the types of monomers. For example, when [A]=CoumC, [A]/NPG is more efficient than [A]/Iod, but revserse trend occurs in some monomers. However, 2-component systems (with CE=0% to 80%) are always less efficient than that of 3-component systems (with CE=70% to 86%, in TMPTA). Specific systems with [A]=coumarins, [B]=Iodonium salt, and N=NPG are analyzed. Analytical formulas for the role of each component concentration, light intensity and coupling rates on the conversion efficacy are derived.
Keywords
polymerization kinetics; photoinitiator; free radical polymerization; photo-oxidation; 3D printing.
Subject
Chemistry and Materials Science, Analytical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
