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Substituent effect in anionic polymerization of β-lactones initiated by alkali metal alkoxides

✍ Scribed by Piotr Kurcok; Andrzej Matuszowicz; Zbigniew Jedliński; Hans R. Kricheldorf; Philippe Dubois; Robert Jérôme

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
345 KB
Volume
16
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The 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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