2-mercapto thioxanthone as a chain transfer agent in free-radical polymerization: A versatile route to incorporate thioxanthone moieties into polymer chain-ends

KARASU F., Arsu N., YAGCI Y.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.103, sa.6, ss.3766-3770, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 103 Sayı: 6
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1002/app.25467
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3766-3770
  • Anahtar Kelimeler: radical polymerization, photopolymerization, initiator, functionalization of polymers, mechanical properties, BLOCK-COPOLYMERS, MACROPHOTOINITIATORS, PHOTOINITIATOR, MACROMERS
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

2-Mercapto thioxanthone (TX-SH) was used as a chain transfer agent in free-radical polymerization of methyl methacrylate (MMA) and styrene (St), by using 2,2-azobisisobutyronitrile (AIBN) as an initiator at 70 degrees C. Chain transfer constants were found to be 1.41 and 0.12 for St and MMA, respectively. The use of TX-SH as a chain transfer agent leads to the formation of polymers with thioxanthone (TX) end groups. The incorporation TX moiety was confirmed by spectral measurements. Polymers obtained this way were used as triplet photosensitizer in free-radical polymerization of MMA in the presence of a hydrogen donor such as N-methyldiethanolamine (MDEA). (c) 2006 Wiley Periodicals, Inc.