Abstract
A series of pyridinium salts were synthesized and investigated as new dyes for photoinitiating systems of polymerization. They exhibit a strong absorption at about 550nm well matching with the visible light emission of different convenient visible light sources. Interestingly, very soft irradiation (halogen lamp) as well as laser diode exposure (457 and 532nm) can be used. When employed in the presence of a silane and an iodonium salt, they efficiently initiate the free radical polymerization of acrylates and free radical promoted cationic polymerization of epoxides. An acrylate/epoxide blend is also easily polymerized i.e. for the synthesis of interpenetrating polymer networks. In combination with amine, the proposed dyes can also initiate free radical polymerizations. The mechanisms analyzed by ESR and photolysis experiments are discussed for the different multi-component initiating systems.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.