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Coordination polymerization of lactides, 5 . Influence of lactide structure on the transesterification processes in the copolymerization with ε‐caprolactone
Author(s) -
Bero Maciej,
Kasperczyk Janusz
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021971015
Subject(s) - copolymer , lactide , transesterification , polymer chemistry , caprolactone , polymerization , ring opening polymerization , materials science , chemistry , organic chemistry , catalysis , polymer
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.