Coordination polymerization of lactides, 5. Influence of lactide structure on the transesterification processes in the copolymerization with ε-caprolactone

✍ Scribed by Maciej Bero; Janusz Kasperczyk

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 362 KB
• Volume: 197
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1996.021971015

✦ Synopsis

Abstract

The influence of lactide configuration on the chain microstructure of lactide/ε‐caprolactone copolymer was investigated. The copolymerization was carried out in the presence of Al(acac)~3~, AlEt~3~ and ZnEt~2~ as initiators. The chain microstructure analysis of the copolymers was performed by means of ^13^C NMR spectroscopy. The effect of lactide configuration on the transesterification and randomization of the copolymer chain was determined. The contribution of transesterification processes in the case of D,L‐lactide was found to be considerably higher than that observed when L,L‐lactide was used.