PHOTOCHEMICAL CATIONIC POLYMERIZATION OF CYCLOHEXENE OXIDE IN SOLUTION CONTAINING PYRIDINIUM SALT AND POLYSILANE

YAGCI Y., KMINEK I., SCHNABEL W.

EUROPEAN POLYMER JOURNAL, cilt.28, sa.4, ss.387-390, 1992 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 4
  • Basım Tarihi: 1992
  • Doi Numarası: 10.1016/0014-3057(92)90259-5
  • Dergi Adı: EUROPEAN POLYMER JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.387-390
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The cationic polymerization of cyclohexene oxide (CHO) is initiated upon u.v. irradiation (lambda(inc) > 350 nm) of dichloromethane solutions containing N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP+ PF6-) and poly(methyl phenyl silane) or poly(dimethyl dephenyl silane). A feasible initiation mechanism involves the photogeneration of silylene biradicals and silyl radicals by extrusion and main-chain scission of the polysilanes, respectively. Oxidation of these radicals by EMP+ ions yields reactive cations capable of initiating the polymerization of CHO.