Abstract
The stereoregularity of poly(α-methylstyrene)s prepared by cationic initiators was determined by 1H NMR spectroscopy. Highly syndiotactic polymers were formed in methylene chloride (CH2Cl2) regardless of the sort of catalysts and polymerization temperature. The syndiotacticity of the polymers obtained in toluene decreased with increasing ionic radius of the catalysts. The polymers prepared by SbCl5 in hexane had the lowest syndiotacticity, presumably due to the tightness of ion pairs and increasing interaction of counterions with the phenyl ring.
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Kawamura, T., Uryu, T., Seki, T. et al. Stereoregularity of Polystyrene Derivatives V. Poly(α-methylstyrene) Obtained by Cationic Catalysts. Polym J 15, 107–110 (1983). https://doi.org/10.1295/polymj.15.107
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DOI: https://doi.org/10.1295/polymj.15.107