One-component bimolecular photoinitiating systems, 2 - Thioxanthone acetic acid derivatives as photoinitiators for free radical polymerization

AYDIN M., Arsu N., YAGCI Y.

MACROMOLECULAR RAPID COMMUNICATIONS, cilt.24, sa.12, ss.718-723, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 12
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1002/marc.200300019
  • Dergi Adı: MACROMOLECULAR RAPID COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.718-723
  • Anahtar Kelimeler: electron transfer, initiators, photopolymerization, radical polymerization, thioxanthone, PHOTOSENSITIZED DECARBOXYLATION, CARBOXYLIC-ACIDS
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The compounds 2-thioxanthone-thioacetic acid and 2-(carboxymethoxy)thioxanthone, bimolecular photoinitiators for free radical polymerization, are synthesized and characterized. Their capability to act as initiators for the polymerization of methyl methacrylate was examined. The postulated mechanism is based on the intermolecular electron-transfer reaction of the excited photoinitiator with the sulfur or oxygen atom of the ground state of the respective photoinitiator followed by decarboxylation. The resulting alkyl radicals initiate the polymerization.