Direct condensation polymerization of lactic acid

Soo Hyun Kim, Young Ha Kim

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


In order to synthesize the higher molecular weight poly(lactic acids) by direct condensation polymerization of lactic acid, dipentaerythritol was used as a chain branching agent. Poly(lactic acids) of high molecular weight, 67000(Mn), was obtained by using antimony trioxide catalyst with good color. This poly(lactic acids) showed Tg of 54.8 °C, Tm of 147°C and cold crystallization temperature of 115°C. The polymer could be melt processed into transparent films. Tensile modulus of 311 Kg/ mm2, tensile strain of 21% and tensile strength of 12.41 Kg/ mm2 were obtained for film collected at 400%/min and drawn 4 times.

Original languageEnglish
Pages (from-to)277-287
Number of pages11
JournalMacromolecular Symposia
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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