J. Nishimura*, Y. Ishida, S. Yamashita
Apr 1, 1983
Citations
0
Influential Citations
2
Citations
Journal
Polymer Journal
Abstract
Stopped-flow spectroscopy was used to study the cationic propagating species in the polymerization of 1,3-bis(P-vinylphenyl)propane and 1,2-bis(P-vinylphenyl)ethane by tri-fluoromethanesulfonic acid in 1,2-dichloroethane. The cationic species generated from the former monomer was found to show a bathochromically shifted absorption at 360 nm, exceeding those of the cationic species generated from the latter monomer (345 nm) and P-methylstyrene (332 nm). This shift is ascribed to the stabilization of the cationic center by an intramolecular through-space interaction with the adjacent terminal styryl group. This stabilization was also suggested by molecular orbital calculation. It is concluded that this interaction facilitates the cyclopolymerization of 1,3-bis(P-vinylphenyl)propane.