Fast transient fluorescence technique for monitoring gelation in free-radical crosslinking copolymerization

Pekcan O., Kaya D., Erdogan M.

POLYMER, cilt.42, sa.2, ss.645-650, 2001 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 2
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0032-3861(00)00361-x
  • Dergi Adı: POLYMER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.645-650
  • Anahtar Kelimeler: fast transient fluorescence, sol-gel phase transition, lifetimes, CROSS-LINKING COPOLYMERIZATION, METHYL-METHACRYLATE, NETWORK FORMATION, ENERGY-TRANSFER, POLYMERIZATION, TRANSITION, MODEL
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The fast transient fluorescence technique was used to study the sol-gel phase transition in free-radical crosslinking copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate. Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. Fluorescence lifetimes of Py from its decay traces were measured and used to monitor the gelation process. Stern-Volmer kinetics was employed to determine the quenching rate constant before the onset of gelation. The MMA consumption rate was measured during the gelation process using the Stern-Volmer model. (C) 2000 Elsevier Science Ltd. Ail rights reserved.