Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 210, Issue 15, Pages 1224-1229Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200900093
Keywords
biodegradable; carbon dioxide; catalysts; copolymerization; polycarbonates; poly(propylene carbonate); synthesis
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Funding
- National Natural Science Foundation of China [20774092, 50733003]
- National Fund for Distinguished Young Scholars [50425309]
- Chinese Academy of Sciences [KGCX-YW-208]
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Cobalt 2,4-dinitrophenolate (complex 1) based upon a N,N,O,O-tetradentate Schiff base ligand framework was prepared. X-ray diffraction analysis confirmed that complex 1 was triclinic species with a six-coordinated central cobalt octahedron in the solid. Asymmetric alternating copolymerization of carbon dioxide (CO2) with racemic propylene oxide (rac-PO) proceeded effectively by complex 1 in conjunction with (4-dimethylamino)pyridine (DMAP), yielding a perfectly alternating and bimodal molecular weight distribution PO/CO2 poly(propylene carbonate) (PPC) with a small amount of cyclic carbonate byproducts.
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