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 CH2C12 solution in the dark at room temperature upon addition of the CT complexes mentioned above. The molar extinction coefficients ~ct and equilibrium constants Kct of the CT complexes have been determined.
Посилання на статтю:
Charge-transfer complexes of pyridinium ions and methyl- and methoxy-substituted benzenes as photoinitiators for the cationic polymerization of cyclohexene oxide and related compounds / G. Hizal*, Y. Yaglci* and W. Schnabel // Polymer. – 1994. – Vol 35. – P. 2428-2431.