Abstract
A method for the preparation of a seven-membered cyclic ether of oxepane of high purity was established. The polymerization of oxepane was successfully performed by cationic initiators such as Et3OBF4, Et3OSbCl6, and SbCl5-epichlorohydrin. The product polymer (mol wt 2500) was a crystalline solid (2θ=19.6° and 24.1°, mp 56–58°C). The equilibrium monomer concentration [M]e was determined from the equilibrated systems both of polymerization and depolymerization, [M]e=8×10−2 mol/l at 30°C and 6×10−2 mol/l at 10°C. On the basis of [M]e, the strain energy of the oxepane monomer was discussed.
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Saegusa, T., Shiota, T., Matsumoto, Si. et al. Ring-opening Polymerization of Oxepane. Polym J 3, 40–43 (1972). https://doi.org/10.1295/polymj.3.40
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DOI: https://doi.org/10.1295/polymj.3.40