PHOTOINITIATED CATIONIC POLYMERIZATION USING O-PHTHALDEHYDE AND PYRIDINIUM SALT


YAGCI Y. , DENIZLIGIL S.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.33, no.9, pp.1461-1464, 1995 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 9
  • Publication Date: 1995
  • Doi Number: 10.1002/pola.1995.080330907
  • Title of Journal : JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Page Numbers: pp.1461-1464

Abstract

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.