An amphiphatic thioxanthone-anthracene photoinitiator for free-radical polymerization


Tunc D., Gacal Özcan B. , Yagci Y.

TURKISH JOURNAL OF CHEMISTRY, cilt.37, ss.525-537, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 37 Konu: 4
  • Basım Tarihi: 2013
  • Doi Numarası: 10.3906/kim-1301-24
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Sayfa Sayıları: ss.525-537

Özet

A novel thioxanthone-anthracene (TX-A) photoinitiator possessing an octyl group, TX-A-Oct, as amphipathic photoinitiator was synthesized by click chemistry. Its ability to initiate photopolymerization of various monomers, namely methyl methacrylate (MMA), acryl amide (Am), butyl acrylate (BA), styrene (St), and a multifunctional monomer trimethylolpropane triacrylate (TMPTA), was examined in both the presence and absence of air. TX-A-Oct was found to be effective in initiating polymerization also in the absence of a co-initiator. UV, FTIR, and fluorescence spectroscopic analysis and polymerization studies revealed that depending on the conditions photoinitiations occur through both anthracene and thioxanthone chromophoric groups by hydrogen abstraction and endoperoxide formation processes, respectively.