Repository logo
 
Thumbnail Image
Publication

Benzoin type photoinitiator for free radical polymerization

Use this identifier to reference this record.

Advisor(s)

Abstract(s)

Benzoin, a popular photoinitiator for free radical polymerization of vinyl monomers, was improved by introduction of two methyl thioether substituents. This new benzoin derivative showed an about 50 times higher light absorption in the near-UV spectral region and performed better than the unsubstituted benzoin in polymerization experiments in bulk solutions or films of acrylate monomers when low initiator concentrations are used. Laser flash photolysis, low temperature luminescence experiments and photoproduct studies by mass spectrometry suggest that a slow -cleavage mechanism (k = 2.2 x 105 s1) from the electronic triplet state with a quantum yield of 0.1 is the primary photoreaction to generate the initiating free radicals. (c) 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013, 51, 1865-1871

Description

Keywords

Laser flash photolysis Photoinitiator Photopolymerization Photochemistry Photophysics Radical polymerization

Citation

Research Projects

Organizational Units

Journal Issue