期刊
POLYMER CHEMISTRY
卷 2, 期 10, 页码 2378-2384出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1py00266j
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资金
- German-Israeli Foundation
- Deutsche Forschungsgemeinschaft
- Fonds der Chemischen Industrie
Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and L-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (M-w/M-n < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and L-lactide.
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