CHARGE-TRANSFER COMPLEXES OF PYRIDINIUM IONS AND METHYL-SUBSTITUTED AND METHOXY-SUBSTITUTED BENZENES AS PHOTOINITIATORS FOR THE CATIONIC POLYMERIZATION OF CYCLOHEXENE OXIDE AND RELATED-COMPOUNDS

HIZAL G., YAGCI Y., SCHNABEL W.

POLYMER, cilt.35, sa.11, ss.2428-2431, 1994 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Sayı: 11
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/0032-3861(94)90783-8
  • Dergi Adı: POLYMER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2428-2431
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The cationic photopolymerization of cyclohexene oxide and 4-vinylcyclohexene dioxide was achieved by using charge-transfer (CT) complexes of pyridinium salts and aromatic electron donors (hexamethylbenzene and 1,2,4-trimethoxybenzene) as initiators. Irradiation of the CT complexes with light of relatively long wavelength produces radical cations of the aromatic electron donors capable of initiating cationic polymerization. N-Vinylcarbazole and n-butyl vinyl ether are spontaneously polymerized in CH2Cl2 SolUtion in the dark at room temperature upon addition of the CT complexes mentioned above. The molar extinction coefficients epsilon(ct) and equilibrium constants K(ct) of the CT complexes have been determined.