Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 16, Issue 20, Pages 6099-6105Publisher
WILEY-BLACKWELL
DOI: 10.1002/chem.200902518
Keywords
lactides; organocatalysis; polyesters; ring-opening polymerization
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Funding
- Research Councils UK (RCUK)
- Warwick Innovative Manufacturing Research Centre (WIMRC)
- EPSRC [EP/C007999/1]
- Engineering and Physical Sciences Research Council [EP/C007999/1, EP/D079136/1] Funding Source: researchfish
- EPSRC [EP/D079136/1] Funding Source: UKRI
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The ring-opening polymerisation of lactide by a range of amino oxazoline and amino thiazoline catalysts is reported. The more electron-rich derivatives are demonstrated to be the most highly active and polymerisation is well controlled, as evidenced by the linear relationship between the molecular weight and both the monomer conversion and the monomer-toinitiator ratio. Mechanistic studies reveal significant interactions between the monomer, initiator and catalyst and that the polymerisation is first order with respect to each of these components. These observations indicate that the polymerisation operates by a general base/pseudo-anionic mechanism.
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