Change search
ReferencesLink to record
Permanent link

Direct link
Polymerization of rac-lactide catalyzed by group 4 metal complexes containing chiral N atoms
Show others and affiliations
2012 (English)In: Polymer Bulletin, ISSN 0170-0839, E-ISSN 1436-2449, Vol. 68, no 7, 1789-1799 p.Article in journal (Refereed) Published
Abstract [en]

The hydroxyl- and phenoxy-bridged dinuclear zirconium and hafnium complexes, 1 and 2, containing a chiral N atom in the N2O2 ligand (H2L = 2-(((2-pyridylmethyl)(2-hydroxyphenyl)amino)methyl)-4,6-di(tert-butyl)ph enol) were used as catalysts for the ring-opening polymerization of rac-lactide. Experiments prove that 1 and 2 are living and controlled catalytic systems with activity up to 3.25 g(pol) mmol(ini) (-1) h(-1). The isotactic-rich polylactides in a narrow polydispersity (M (w)/M (n) = 1.01-1.13) were produced with enantiomeric complexes 1 and 2 (P (m) = 0.65-0.73). The kinetic studies show a first-order dependency in both monomer and initiator. The initiation mechanism is discussed on the basis of the MALDI-TOF MS and H-1 NMR spectra of the rac-LA oligomer prepared by 1.

Place, publisher, year, edition, pages
2012. Vol. 68, no 7, 1789-1799 p.
Keyword [en]
Hafnium, Isoselectivity, Lactide, Polymerization, Zirconium
National Category
Polymer Chemistry
URN: urn:nbn:se:kth:diva-93915DOI: 10.1007/s00289-011-0647-0ISI: 000302255300001ScopusID: 2-s2.0-84861460911OAI: diva2:525176
Knut and Alice Wallenberg Foundation
QC 20120507Available from: 2012-05-07 Created: 2012-05-03 Last updated: 2012-05-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Sun, Licheng
By organisation
Organic Chemistry
In the same journal
Polymer Bulletin
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 14 hits
ReferencesLink to record
Permanent link

Direct link