Synthesis of high-molecular-weight poly(L-lactic acid) by direct polycondensation

Cited 95 time in webofscience Cited 0 time in scopus
  • Hit : 144
  • Download : 0
Full Paper: To prepare poly(lactic acid) (PLA) with improved mechanical properties, high-molecular-weight poly(L-lactic acid) (PLLA) was synthesized by the direct polycondensation of lactic acid in solution phase. During polymerization, the molecular weight of PLA was influenced by the water content present in the solution; thus, the experimental apparatus was designed to remove the water efficiently and this study was focused on the optimization of the polymerization conditions such as polymerization time, solvent, and kinds of catalyst, etc. Additionally, to search for a good catalyst in the polymerization, the mixed oxide catalysts were synthesized by sol-gel method and it was characterized by XRD and BET. The results show that the (M) over bar (v) of PLA obtained was about 33 000, when 0.2 wt.-% of SnCl2.2H(2)O was used as a catalyst in the polymerization. The DSC study shows that the thermal properties of PLA such as T-g and T-m were influenced by the kind of solvent as well as the molecular weight of PLA.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2002-10
Language
English
Article Type
Article
Keywords

DIRECT CONDENSATION POLYMERIZATION; RING-OPENING POLYMERIZATION; BASIC PROPERTIES; LACTIC-ACID; POLYLACTIDES

Citation

MACROMOLECULAR CHEMISTRY AND PHYSICS, v.203, no.15, pp.2245 - 2250

ISSN
1022-1352
URI
http://hdl.handle.net/10203/250653
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 95 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0