Visible light polymerization of acrylate using dialkylphenacylsulfonium butyltriphenylborate initiators: Effect of the reduction potential of the sulfonium cation on the polymerization

Yasumasa Toba, Yoshiharu Usui, Toshifumi Konishi, Osamu Ito, Takahiko Uesugi

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Abstract

Visible light polymerization of an acrylate in poly(methyl methacrylate) (PMMA) film using a series of dialkylphenacylsulfonium butyltriphenylborate initiators was investigated. When 3,3′-carbonylbis(7-diethylaminocoumarin) (KCD) was used as a sensitizer, the rates of polymerization (R p) and the degrees of conversion increased with increasing the reduction potential of the sulfonium cations of the sulfonium borates. They also increased with decreasing lowest unoccupied molecular orbital (LUMO) energy level for the same cations. The photoreaction between the sulfonium berates and KCD was discussed.

Original languageEnglish
Pages (from-to)6545-6551
Number of pages7
JournalMacromolecules
Volume32
Issue number20
DOIs
Publication statusPublished - 1999 Oct 5

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ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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