Photoreaction and photoinitiation behavior in the light-cured dental composite resins

Yukio Fujimori*, Takashi Kaneko, Hiroyuki Nishide, Eishun Tsuchida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Photoreaction of camphorquinone (CQ) and dimethylaminoethyl methacrylate (DMAEMA) and its initiation capability of MMA polymerization was studied as a model system for visible light-cured dental composite resins. The photo-sensitizer (CQ) produced CQ radical anion by irradiation in the presence of the reducing agent (DMAEMA) under N2. ESR signal intensity and the IR and UV-Vis absorption spectra of CQ carbonyl group decreased during irradiation, and the polymerization rate of MMA depended on the decrease in the CQ carbonyl group. The hydrogen abstraction reaction by CQ radical seemed to promote the polymerization of MMA. Atmospheric oxygen inactivated the CQ radical and reduced the polymerization.

Original languageEnglish
Pages (from-to)485-488
Number of pages4
JournalKobunshi Ronbunshu
Issue number6
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • General Environmental Science
  • Materials Science (miscellaneous)
  • Ceramics and Composites
  • Polymers and Plastics


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