Polylactones—18. Polymerization of l,l-lactide with Sn(II) and Sn(IV) halogenides
✍ Scribed by Hans R. Kricheldorf; Movita Sumbél
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 476 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0014-3057
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## Abstract Commercial FeCl~2~ and Fe(II) glycolate, Fe(II) L‐lactate or Fe(II) L‐mandelate were used as initiators for the polymerization of L‐lactide. All polymerizations were conducted in bulk at 150°C, because no conversion was observed in bulk at 120°C. The Fe(II) lactate was found to be more
## Abstract Zn(II) L‐lactate (ZnLac~2~) was prepared either from ZnO and ethyl L‐lactate or with slightly higher optical purity from ZnO and L‐lactide. Using water‐free ZnLac~2~ L‐lactide was polymerized in bulk at 120°C or 150°C. Higher yields and higher molecular weights were found at 150°C. The
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