THE ROLE OF COMPLEX-FORMATION IN THE ANIONIC-POLYMERIZATION OF L-LACTIDE

Authors
SIPOS L GUNDA T ZSUGA M
Citation
L. Sipos et al., THE ROLE OF COMPLEX-FORMATION IN THE ANIONIC-POLYMERIZATION OF L-LACTIDE, Polymer bulletin, 38(5), 1997, pp. 609-612
Citations number
9
Categorie Soggetti
Polymer Sciences
Journal title
Polymer bulletin → ACNP
ISSN journal
01700839
Volume
38
Issue
5
Year of publication
1997
Pages
609 - 612
Database
ISI
SICI code
0170-0839(1997)38:5<609:TROCIT>2.0.ZU;2-T
Abstract
The rate lowering effect of crown ethers in the anionic polymerization of L-lactide is interpreted by the formation of activated monomer-cat ion complex. This interpretation is supported by molecular mechanics c alculations. The formation of a 1:1 complex between lithium ion and L- lactide in THF was proved by H-1 NMR and the formation constant was me asured to be 3.8 M-1.