Abstract
AbstractThe influence of methyl substituent on the mechanism of the ring‐opening polymerization of β‐lactones initiated by alkali metal alkoxides is discussed. Attention has been paid to the effect of the substituent position in the monomer molecule on the ring‐opening mechanism, the 3,3‐dimethyl‐2‐oxetanone (pivalolactone), 4‐methyl‐2‐oxetanone (β‐butyrolactone) and 2‐oxetanone (β‐propiolactone) being chosen as model monomers. Moreover, it was found unexpectedly that in the case of pivalolactone polymerization, besides open‐chain polymers, cyclic oligomers are produced.
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