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.
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Nishimura, J., Ishida, Y., Yamashita, S. et al. C3 Cyclopolymerization VI1. Direct Observation of the Propagating Species in the Cationic Polymerization of 1,3-Bis(P-vinylphenyl)propane in 1,2-Dichloroethane. Polym J 15, 303–307 (1983). https://doi.org/10.1295/polymj.15.303
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DOI: https://doi.org/10.1295/polymj.15.303