Abstract
The polymerization of benzyl vinyl ether (BVE) was investigated in toluene by Et3Al–TiCl4 catalyst. When the catalyst preparation and the monomer addition were carried out at 0°C and the reaction mixture was brought to 60°C, an insoluble polymeric product was obtained together with poly(benzyl vinyl ether) (PBVE). This insoluble product was revealed to be a polymer composed of BVE and vinyl alcohol units complexed with titanium compound. This was formed by the reaction of PBVE and TiCl4 in the catalyst system and the subsequent hydrolysis of the reaction product. Poly(vinyl alcohol) (PVA) complexed with a titanium compound was obtained by the reaction of PBVE and TiCl4 in toluene at room temperature. When the molar ratio of TiCl4 to PBVE was above 0.3, PBVE was completely debenzylated and became insoluble by being complexed with a titanium compound. The composition of this product was roughly estimated to be [–{–CH2–CH(OH)–}6– TiCl(OH)3]n. The complexed PVA was soluble only in hydrochloric acid and could be converted to free PVA by reprecipitation from a solution containing acetylacetone.
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Yuki, H., Hatada, K., Murahashi, S. et al. Polymerization of Benzyl Vinyl Ether with a Ziegler Catalyst and Reaction of Poly(benzyl vinyl ether) with TiCl4. Polym J 1, 271–277 (1970). https://doi.org/10.1295/polymj.1.271
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DOI: https://doi.org/10.1295/polymj.1.271
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