Living Polymerization of Lactide Using Titanium Alkoxide Catalysts | Zendy

Kim Youngjo | Zendy; Verkade John G. | Zendy

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Living Polymerization of Lactide Using Titanium Alkoxide Catalysts

Author(s) -

Kim Youngjo,

Verkade John G.

Publication year - 2005

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.200550610

Subject(s) - lactide , alkoxide , polymerization , ring opening polymerization , homonuclear molecule , polymer chemistry , tacticity , materials science , titanium , catalysis , living polymerization , polymer , chemistry , radical polymerization , organic chemistry , molecule , composite material , metallurgy

Several titanium isopropoxides have facilitated the ring opening polymerization of l ‐lactide (LA) and rac ‐lactide in toluene solution at various polymerization temperatures via a coordination insertion mechanism. Depending on catalysts, the controlled/living poly( l ‐lactide), or the heterotactic‐biased poly( rac ‐lactide) were obtained. The stereochemical microstructure of polylactide (PLA) was determined from homonuclear decoupled 1 H NMR spectral studies. Such spectra of PLA derived from rac ‐LA featured the characteristic five‐methine resonance pattern, whereas corresponding spectra derived from l ‐LA exhibited only one methine peak.

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