Effect of Amine Structure on Photoreduction of Hydrogen Abstraction Initiators
Document Type
Article
Publication Date
10-8-2002
Department
Polymers and High Performance Materials
Abstract
The photocuring rates of acrylate monomers initiated by abstraction type photoinitiators (benzophonone, isopropylthioxanthone, and IV-methylmaleimide) and a series of structurally different tertiary amine combinations are reported. Photo-DSC results confirm that transferable hydrogens on tertiary amines are essential for efficient acrylate polymerization. Laser flash photolysis experiments were carried out to define the electron/proton transfer reactions which occur between excited triplet states of the photoinitiators and tertiary amines. In the case of N-methylmaleimide, an intermediate radical anion was detected for amines with no readily transferable proton. This confirms that the photoreduction of the triplet state of N-substituted maleimides by tertiary amines occurs by an electron/proton transfer when the tertiary amine electron donor has a transferable proton.
Publication Title
Macromolecules
Volume
35
Issue
21
First Page
7963
Last Page
7967
Recommended Citation
Viswanathan, K.,
Hoyle, C.,
Jönsson, E. S.,
Nason, C.,
Lindgren, K.
(2002). Effect of Amine Structure on Photoreduction of Hydrogen Abstraction Initiators. Macromolecules, 35(21), 7963-7967.
Available at: https://aquila.usm.edu/fac_pubs/3477