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Kinetics and Mechanism of l-Lactide Polymerization Using Two Different Yttrium Alkoxides as Initiators
Abstract
Polymerization of l -lactide in dichloromethane at 25 °C using an initiating system comprising tris(2,6-di- tert -butylphenoxy)yttrium and 2-propanol was first order in monomer and initiator. A propagation rate constant of 1.92 × 10 3 L mol -1 min -1 was determined using in situ UV spectroscopy. In the first step the large 2,6-di- tert -butylphenoxy ligands are exchanged for the sterically less demanding 2-propoxide ligands. In the second step the alkoxide is able to attack the carbonyl group with formation of the ring-opened product. After the first two initiating steps the polymerization can proceed until the equilibrium conversion of monomer is reached. Evidence for these three steps is provided by 1 H and 13 C NMR spectroscopy of the reaction products of each step. The kinetic behavior of commercially available yttrium isopropoxide was more complicated.
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Shannon, R. D. (1976) · Acta Crystallographica Section A · doi:10.1107/s0567739476001551 · Cited by 66,145
Kricheldorf, H. R., Berl, M., & Scharnagl, N. (1988) · Macromolecules · doi:10.1021/ma00180a002 · Cited by 597
Polylactones, 19. Anionic polymerization of L‐lactide in solution
Kricheldorf, H. R., & Kreiser‐Saunders, I. (1990) · Die Makromolekulare Chemie · doi:10.1002/macp.1990.021910508 · Cited by 149
Jedliński, Z., Wałach, W., Kurcok, P., & Adamus, G. (1991) · Die Makromolekulare Chemie · doi:10.1002/macp.1991.021920914 · Cited by 116
Barakat, I., Dubois, P., Jerome, R., & Teyssie, P. (1991) · Macromolecules · doi:10.1021/ma00024a029 · Cited by 73
Highly reactive yttrium alkoxide as new initiator for the polymerization of β‐butyrolactone
Borgne, A. L., Pluta, C., & Spassky, N. (1994) · Macromolecular Rapid Communications · doi:10.1002/marc.1994.030151208 · Cited by 72
Cited by
Controlled Ring-Opening Polymerization of Lactide and Glycolide
Dechy-Cabaret, O., Martin-Vaca, B., & Bourissou, D. (2004) · Chemical Reviews · doi:10.1021/cr040002s · Cited by 2,257
Recent Developments in Ring Opening Polymerization of Lactones for Biomedical Applications
Albertsson, A.-C., & Varma, I. K. (2003) · Biomacromolecules · doi:10.1021/bm034247a · Cited by 1,582
Polymerization of lactide and related cyclic esters by discrete metal complexes
O'Keefe, B. J., Hillmyer, M. A., & Tolman, W. B. (2001) · Journal of the Chemical Society, Dalton Transactions · doi:10.1039/b104197p · Cited by 825
Biocompatible Initiators for Lactide Polymerization
Platel, R., Hodgson, L., & Williams, C. (2008) · Polymer Reviews · doi:10.1080/15583720701834166 · Cited by 706
Controlled Ring-Opening Polymerization: Polymers with designed Macromolecular Architecture
Stridsberg, K. M., Ryner, M., & Albertsson, A.-C. (2002) · Advances in Polymer Science · doi:10.1007/3-540-45734-8_2 · Cited by 375
Metadata
- Authors
- Stevels, W. M., Ankoné, Dijkstra, P. J., & Feijen, J.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 1996-01-01
- Volume
- 29
- Issue
- 19
- Pages
- 6132-6138
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2083282609
- Cited by
- 158
- References
- 6
- FWCI
- 3.63
- Type
- journal article
- Language
- en
- Open access
- closed
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- Stevels, W. M., Ankoné, Dijkstra, P. J., & Feijen, J. (1996). Kinetics and Mechanism of l-Lactide Polymerization Using Two Different Yttrium Alkoxides as Initiators. Macromolecules. https://doi.org/10.1021/ma9605311
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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