Synthesis and characterization of poly(ethylene oxide)/polylactide/poly(ethylene oxide) triblock copolymer

Soo Hong Lee, Soo Hyun Kim, Yang Kyoo Han, Young Ha Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Poly(ethylene oxide/polylactide/poly(ethylene oxide)) (PEO/PL/PEO) triblock copolymers, in which each block is connected by an ester bond, were synthesized by a coupling reaction between PL and PEO. Hydroxyl-terminated PLs with various molecular weights were synthesized and used as hard segments. Hydroxyl-terminated PEOs were converted to the corresponding acid halides via their acid group and used as a soft segment. Triblock copolymers were identified by Fourier transform infrared spectroscopy, 1H NMR, and gel permeation chromatography. Differential scanning calorimetry (DSC) and X-ray diffractometry of PEO/PL/PEO triblock copolymers suggested that PL and PEO blocks were phase-separated and that the crystallization behavior of the PL block was markedly affected by the presence of the PEO block. PEO/PL/PEO triblock copolymers with PEO 0.75k had two exothermic peaks (by DSC), and both peaks were related to the crystallization of PL. According to thermogravimetric analysis, PEO/PL/PEO triblock copolymer showed a higher thermal stability than PL or PEO.

Original languageEnglish
Pages (from-to)2545-2555
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume40
Issue number15
DOIs
Publication statusPublished - 2002 Aug 1
Externally publishedYes

Fingerprint

Polyethylene oxides
Block copolymers
Crystallization
poly(lactide)
Hydroxyl Radical
Differential scanning calorimetry
Acids
Gel permeation chromatography
X ray diffraction analysis
Fourier transform infrared spectroscopy
Thermogravimetric analysis
Esters
Thermodynamic stability
Molecular weight
Nuclear magnetic resonance

Keywords

  • Biodegradable
  • Biodegradable polymer
  • Biomaterials
  • Block copolymers
  • Poly(ethylene oxide)
  • Polylactide
  • Triblock copolymer

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Synthesis and characterization of poly(ethylene oxide)/polylactide/poly(ethylene oxide) triblock copolymer. / Lee, Soo Hong; Kim, Soo Hyun; Han, Yang Kyoo; Kim, Young Ha.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 40, No. 15, 01.08.2002, p. 2545-2555.

Research output: Contribution to journalArticle

Lee, Soo Hong ; Kim, Soo Hyun ; Han, Yang Kyoo ; Kim, Young Ha. / Synthesis and characterization of poly(ethylene oxide)/polylactide/poly(ethylene oxide) triblock copolymer. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2002 ; Vol. 40, No. 15. pp. 2545-2555.
@article{1752e5e0815046c4983c9063010d69c3,
title = "Synthesis and characterization of poly(ethylene oxide)/polylactide/poly(ethylene oxide) triblock copolymer",
abstract = "Poly(ethylene oxide/polylactide/poly(ethylene oxide)) (PEO/PL/PEO) triblock copolymers, in which each block is connected by an ester bond, were synthesized by a coupling reaction between PL and PEO. Hydroxyl-terminated PLs with various molecular weights were synthesized and used as hard segments. Hydroxyl-terminated PEOs were converted to the corresponding acid halides via their acid group and used as a soft segment. Triblock copolymers were identified by Fourier transform infrared spectroscopy, 1H NMR, and gel permeation chromatography. Differential scanning calorimetry (DSC) and X-ray diffractometry of PEO/PL/PEO triblock copolymers suggested that PL and PEO blocks were phase-separated and that the crystallization behavior of the PL block was markedly affected by the presence of the PEO block. PEO/PL/PEO triblock copolymers with PEO 0.75k had two exothermic peaks (by DSC), and both peaks were related to the crystallization of PL. According to thermogravimetric analysis, PEO/PL/PEO triblock copolymer showed a higher thermal stability than PL or PEO.",
keywords = "Biodegradable, Biodegradable polymer, Biomaterials, Block copolymers, Poly(ethylene oxide), Polylactide, Triblock copolymer",
author = "Lee, {Soo Hong} and Kim, {Soo Hyun} and Han, {Yang Kyoo} and Kim, {Young Ha}",
year = "2002",
month = "8",
day = "1",
doi = "10.1002/pola.10339",
language = "English",
volume = "40",
pages = "2545--2555",
journal = "Journal of Polymer Science, Part A: Polymer Chemistry",
issn = "0887-624X",
publisher = "John Wiley and Sons Inc.",
number = "15",

}

TY - JOUR

T1 - Synthesis and characterization of poly(ethylene oxide)/polylactide/poly(ethylene oxide) triblock copolymer

AU - Lee, Soo Hong

AU - Kim, Soo Hyun

AU - Han, Yang Kyoo

AU - Kim, Young Ha

PY - 2002/8/1

Y1 - 2002/8/1

N2 - Poly(ethylene oxide/polylactide/poly(ethylene oxide)) (PEO/PL/PEO) triblock copolymers, in which each block is connected by an ester bond, were synthesized by a coupling reaction between PL and PEO. Hydroxyl-terminated PLs with various molecular weights were synthesized and used as hard segments. Hydroxyl-terminated PEOs were converted to the corresponding acid halides via their acid group and used as a soft segment. Triblock copolymers were identified by Fourier transform infrared spectroscopy, 1H NMR, and gel permeation chromatography. Differential scanning calorimetry (DSC) and X-ray diffractometry of PEO/PL/PEO triblock copolymers suggested that PL and PEO blocks were phase-separated and that the crystallization behavior of the PL block was markedly affected by the presence of the PEO block. PEO/PL/PEO triblock copolymers with PEO 0.75k had two exothermic peaks (by DSC), and both peaks were related to the crystallization of PL. According to thermogravimetric analysis, PEO/PL/PEO triblock copolymer showed a higher thermal stability than PL or PEO.

AB - Poly(ethylene oxide/polylactide/poly(ethylene oxide)) (PEO/PL/PEO) triblock copolymers, in which each block is connected by an ester bond, were synthesized by a coupling reaction between PL and PEO. Hydroxyl-terminated PLs with various molecular weights were synthesized and used as hard segments. Hydroxyl-terminated PEOs were converted to the corresponding acid halides via their acid group and used as a soft segment. Triblock copolymers were identified by Fourier transform infrared spectroscopy, 1H NMR, and gel permeation chromatography. Differential scanning calorimetry (DSC) and X-ray diffractometry of PEO/PL/PEO triblock copolymers suggested that PL and PEO blocks were phase-separated and that the crystallization behavior of the PL block was markedly affected by the presence of the PEO block. PEO/PL/PEO triblock copolymers with PEO 0.75k had two exothermic peaks (by DSC), and both peaks were related to the crystallization of PL. According to thermogravimetric analysis, PEO/PL/PEO triblock copolymer showed a higher thermal stability than PL or PEO.

KW - Biodegradable

KW - Biodegradable polymer

KW - Biomaterials

KW - Block copolymers

KW - Poly(ethylene oxide)

KW - Polylactide

KW - Triblock copolymer

UR - http://www.scopus.com/inward/record.url?scp=0036682031&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036682031&partnerID=8YFLogxK

U2 - 10.1002/pola.10339

DO - 10.1002/pola.10339

M3 - Article

AN - SCOPUS:0036682031

VL - 40

SP - 2545

EP - 2555

JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

SN - 0887-624X

IS - 15

ER -