Synthesis of high-molecular-weight poly( l-lactic acid) through the direct condensation polymerization of l-lactic acid in bulk state

Synthesis of high-molecular-weight poly( l-lactic acid) through the direct condensation polymerization of l-lactic acid in bulk state

A strategy was attempted to produce high-molecular-weight poly( l-lactic acid) (PLLA) through the direct condensation polymerization of l-lactic acid in bulk state. Polymerizations were carried out with titanium(IV) butoxide (TNBT) as a catalyst employing different duration of decompression, esterif...

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Veröffentlicht in:European polymer journal 2006-02, Vol.42 (2), p.468-472
Hauptverfasser: Chen, Guang-Xin, Kim, Hun-Sik, Kim, Eung-Soo, Yoon, Jin-San
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Direct condensation polymerization
Exact sciences and technology
High molecular weight
Organic polymers
Physicochemistry of polymers
Poly( l-lactic acid)
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
Stereosequence
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Zusammenfassung:A strategy was attempted to produce high-molecular-weight poly( l-lactic acid) (PLLA) through the direct condensation polymerization of l-lactic acid in bulk state. Polymerizations were carried out with titanium(IV) butoxide (TNBT) as a catalyst employing different duration of decompression, esterification and polycondensation. The molecular weights were characterized by using the gel permeation chromatography (GPC). The stereosequences were analyzed from the 13C NMR spectra on the basis of the triad fractions.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2005.07.022