Thiol-ene Free-Radical and Vinyl Ether Cationic Hybrid Photopolymerization
Polymers and High Performance Materials
The photopolymerization kinetics of mixtures containing a trithiol and a trivinyl ether (in different molar ratios) with a cationic photoinitiator were investgated by real-time infrared and real-time theology. Using this combination of real-time methods to follow both chemical conversion and theological property development, a clear picture of physical property development during the complete polymerization process is obtained. This represents the first example of a thiol-ene radical/ene cationic two-step hybrid photopolymerization process in which thiol copolymerizes with vinyl ether functional groups in a rapid radical step growth process followed by vinyl ether cationic bomopolymerization. The sequential thiol-vinyl ether copolymerization and the vinyl ether cationic polymerization result in cross-linked networks with thermal and mechanical properties that are combinations of each system.
Otaigbe, J. U.,
Hoyle, C. E.
(2007). Thiol-ene Free-Radical and Vinyl Ether Cationic Hybrid Photopolymerization. Macromolecules, 40(24), 8788-8793.
Available at: http://aquila.usm.edu/fac_pubs/1871