Direct condensation polymerization of lactic acid

Soo Hyun Kim, Young Ha Kim

Research output: Chapter in Book/Report/Conference proceedingChapter

33 Citations (Scopus)

Abstract

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/ mm 2, tensile strain of 21% and tensile strength of 12.41 Kg/ mm 2 were obtained for film collected at 400%/min and drawn 4 times.

Original languageEnglish
Title of host publicationMacromolecular Symposia
Pages277-287
Number of pages11
Volume144
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

Lactic acid
Polycondensation
Lactic Acid
Molecular weight
Tensile strain
Crystallization
Polymers
Antimony
Tensile strength
Elastic moduli
Color
Catalysts
poly(lactic acid)
Temperature

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

Kim, S. H., & Kim, Y. H. (1999). Direct condensation polymerization of lactic acid. In Macromolecular Symposia (Vol. 144, pp. 277-287)

Direct condensation polymerization of lactic acid. / Kim, Soo Hyun; Kim, Young Ha.

Macromolecular Symposia. Vol. 144 1999. p. 277-287.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kim, SH & Kim, YH 1999, Direct condensation polymerization of lactic acid. in Macromolecular Symposia. vol. 144, pp. 277-287.
Kim SH, Kim YH. Direct condensation polymerization of lactic acid. In Macromolecular Symposia. Vol. 144. 1999. p. 277-287
Kim, Soo Hyun ; Kim, Young Ha. / Direct condensation polymerization of lactic acid. Macromolecular Symposia. Vol. 144 1999. pp. 277-287
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