New attempt at the stereoselective polymerization of lactide by using crystallization during polymerization

Akihiro Ando, Kunio Kimura, Yuko Onda, Yuhiko Yamashita

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The stereoselective polymerization of partial rac-lactide was attempted by using crystallization during polymerization. Polymerizations were carried out with trifluoromethanesulfonic acid in a mixed solvent of toluene and octane. The molar content of L-lactate in the feed was 95%. Polymerization proceeded with the elimination of D-lactate by means of crystallization. Poly(L-lactic acid) (PLLA) crystals were first precipitated and then plate-like poly(lactic acid) (PLA) crystals were finally obtained, of which the composition of L-lactate was 97.6% and the M̄n was 1.68 × 104.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalMacromolecular Rapid Communications
Volume26
Issue number2
DOIs
Publication statusPublished - Jan 21 2005

Fingerprint

Crystallization
Polymerization
Lactic Acid
Lactic acid
Crystals
Toluene
Acids
dilactide
Chemical analysis
poly(lactic acid)

Keywords

  • Biodegradable
  • Crystallization
  • Oligomers
  • Polyesters
  • Stereospecific polymers

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

New attempt at the stereoselective polymerization of lactide by using crystallization during polymerization. / Ando, Akihiro; Kimura, Kunio; Onda, Yuko; Yamashita, Yuhiko.

In: Macromolecular Rapid Communications, Vol. 26, No. 2, 21.01.2005, p. 98-102.

Research output: Contribution to journalArticle

@article{acd2197ee73c48d79e71bfa1f37a5edb,
title = "New attempt at the stereoselective polymerization of lactide by using crystallization during polymerization",
abstract = "The stereoselective polymerization of partial rac-lactide was attempted by using crystallization during polymerization. Polymerizations were carried out with trifluoromethanesulfonic acid in a mixed solvent of toluene and octane. The molar content of L-lactate in the feed was 95{\%}. Polymerization proceeded with the elimination of D-lactate by means of crystallization. Poly(L-lactic acid) (PLLA) crystals were first precipitated and then plate-like poly(lactic acid) (PLA) crystals were finally obtained, of which the composition of L-lactate was 97.6{\%} and the M̄n was 1.68 × 104.",
keywords = "Biodegradable, Crystallization, Oligomers, Polyesters, Stereospecific polymers",
author = "Akihiro Ando and Kunio Kimura and Yuko Onda and Yuhiko Yamashita",
year = "2005",
month = "1",
day = "21",
doi = "10.1002/marc.200400428",
language = "English",
volume = "26",
pages = "98--102",
journal = "Macromolecular Rapid Communications",
issn = "1022-1336",
publisher = "Wiley-VCH Verlag",
number = "2",

}

TY - JOUR

T1 - New attempt at the stereoselective polymerization of lactide by using crystallization during polymerization

AU - Ando, Akihiro

AU - Kimura, Kunio

AU - Onda, Yuko

AU - Yamashita, Yuhiko

PY - 2005/1/21

Y1 - 2005/1/21

N2 - The stereoselective polymerization of partial rac-lactide was attempted by using crystallization during polymerization. Polymerizations were carried out with trifluoromethanesulfonic acid in a mixed solvent of toluene and octane. The molar content of L-lactate in the feed was 95%. Polymerization proceeded with the elimination of D-lactate by means of crystallization. Poly(L-lactic acid) (PLLA) crystals were first precipitated and then plate-like poly(lactic acid) (PLA) crystals were finally obtained, of which the composition of L-lactate was 97.6% and the M̄n was 1.68 × 104.

AB - The stereoselective polymerization of partial rac-lactide was attempted by using crystallization during polymerization. Polymerizations were carried out with trifluoromethanesulfonic acid in a mixed solvent of toluene and octane. The molar content of L-lactate in the feed was 95%. Polymerization proceeded with the elimination of D-lactate by means of crystallization. Poly(L-lactic acid) (PLLA) crystals were first precipitated and then plate-like poly(lactic acid) (PLA) crystals were finally obtained, of which the composition of L-lactate was 97.6% and the M̄n was 1.68 × 104.

KW - Biodegradable

KW - Crystallization

KW - Oligomers

KW - Polyesters

KW - Stereospecific polymers

UR - http://www.scopus.com/inward/record.url?scp=13244299668&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=13244299668&partnerID=8YFLogxK

U2 - 10.1002/marc.200400428

DO - 10.1002/marc.200400428

M3 - Article

VL - 26

SP - 98

EP - 102

JO - Macromolecular Rapid Communications

JF - Macromolecular Rapid Communications

SN - 1022-1336

IS - 2

ER -