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, vol.35, no.11, pp.2428-2431, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 11
  • Publication Date: 1994
  • Doi Number: 10.1016/0032-3861(94)90783-8
  • Title of Journal : POLYMER
  • Page Numbers: pp.2428-2431

Abstract

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.