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Penta‐Hydroxy Flavones‐Based Photoinitiating Systems for Free Radical, Cationic, and Thiol‐Ene Polymerization upon Exposure to Mild Blue LEDs
Author(s) -
Zhu Di,
Peng Xiaotong,
Xiao Pu
Publication year - 2021
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.202100059
Subject(s) - photoinitiator , photopolymer , cationic polymerization , morin , photochemistry , polymerization , radical polymerization , ene reaction , reactivity (psychology) , chemistry , materials science , polymer chemistry , organic chemistry , monomer , polymer , medicine , alternative medicine , pathology
Natural flavone‐derivatives (i.e., morin and quercetin) are investigated as visible light‐sensitive photoinitiators. The photochemical mechanisms of the radical generation from flavone‐derivative‐based photoinitiating systems (PISs) upon exposure to mild blue light‐emitting diodes are studied. The impact of substituent site of functional groups on the photoinitiation ability is determined. The quercetin‐based PISs exhibit more reactivity than the morin‐based systems on free radical photopolymerization. Moreover, the investigated flavone‐based PISs present their stabilities at room temperature, indicating that resin containing these systems barely require special storage requirements. Thiol‐ene polymerization initiated by the flavone‐derivatives‐based PISs is also investigated.