PHOTOINITIATED CATIONIC POLYMERIZATION USING O-PHTHALDEHYDE AND PYRIDINIUM SALT


YAGCI Y. , DENIZLIGIL S.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, cilt.33, ss.1461-1464, 1995 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 33 Konu: 9
  • Basım Tarihi: 1995
  • Doi Numarası: 10.1002/pola.1995.080330907
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Sayfa Sayıları: ss.1461-1464

Özet

The cationic polymerization of cyclohexene oxide (CHO), n-butyl vinylether (BVE), N-vinylcarbazole (NVC), and 4-vinyl cyclohexenedioxide (4-VCHD) is initiated upon UV irradiation (lambda(inc.) = 350 nm) of dichloromethane solution containing N-ethoxy-2-methyl-pyridinium hexafluorophosphate (EMP(+)PF(6)) and o-phthaldehyde. A feasible initiation mechanism involves formation of biradical by intramolecular hydrogen abstraction of triplet o-phthaldehyde. Oxidation of these radicals by EMP(+) ions yields protons capable of initiating the cationic polymerization. (C) 1995 John Wiley & Sons, Inc.