PHOTOINITIATED CATIONIC POLYMERIZATION USING O-PHTHALDEHYDE AND PYRIDINIUM SALT

YAGCI Y., DENIZLIGIL S.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, cilt.33, sa.9, ss.1461-1464, 1995 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 9
  • Basım Tarihi: 1995
  • Doi Numarası: 10.1002/pola.1995.080330907
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1461-1464
  • İstanbul Teknik Üniversitesi Adresli: Evet

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.