Polymerization via anionic mechanisms or insertion mechanisms (pseudoanionic mechanisms) are compared for β‐lactones and L‐lactide. The following aspects are discussed: initiation and deprotonation of β‐lactones, back‐biting degradation, stereosequences of poly(β‐D,L‐butyrolactone), racemization of L‐lactide, systematic variation of endgroups including synthesis of macromers.
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Kricheldorf et al. (1990) studied this question.
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