Repozytorium
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Kolekcje
Inne
Titanium complexes supported by bis(aryloxo) ligand: structure and lactide polymerization activities.
Autorzy
Rok wydania
2006
Czasopismo
Journal of Molecular Catalysis A-Chemical
Numer woluminu
257
Strony
105-111
DOI
10.1016/j.molcata.2006.04.063
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Titanium bis(aryloxo) complexes, [Ti2(μ-OEt)2(edbp)2(OEt)2] (1) and [Ti(edbp)(OiPr)2] (2) (edbp-H2 = 2,2′-ethylidenebis(4,6-di-tert-butylphenol) have been prepared and characterized. It was shown that compounds 1 and 2 were efficient initiators in a process of ring-opening polymerization (ROP) of cyclic esters. The catalytic behavior of complexes 1 and 2 in the polymerization of l- and rac-lactide (l-LA and rac-LA) was studied in toluene at 70 °C with a monomer to initiator ratio fixed at 100. The dimeric complex 1 initiated polymerization of lactide in 90% conversion within 2.5 h to afford polylactide (PLA) with Mn of 17,500 and PDI of 1.06. The parameters of PLA obtained with the monomeric complex 2 were similar (Mn = 18,000, PDI = 1.08). Microstructures of polymers obtained from rac-LA for both initiators were assigned as heterotactic.
Słowa kluczowe
Bis(aryloxo) complexes, Lactides, Polymerization, Titanium
Adres publiczny
https://doi.org/10.1016/j.molcata.2006.04.063
Strona internetowa wydawcy
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