Preliminary study on the preparation of poly(D,L-lactide/propylene glycol) triblock and cross- linked copolymers

Ain Athirah Zainuddin, Siti Munirah Manap, Farah Hannan Anuar

Research output: Contribution to journalArticle

Abstract

This study aims to improve the properties of poly(D,L-lactide) (PDLLA)through copolymerization with poly(propylene glycol)(PPG) followed by cross-linking process. Cross-linked copolymer poly(D,L-lactide/propylene glycol) with strong and elastic properties wasobtained in two steps. First step wasthe synthesis of PDLLA-PPG-PDLLA triblock copolymer via melt polymerization method. The second step was the cross-linking process where the triblock copolymers reacted with hexametylenediisocyanate (HMDI) as chain extender and glycerol as cross-link agent. The formation of triblock copolymer was identified from the presence of a signal at 4.3 ppm in the1H NMRspectrum which belongs to the PDLLA repeating unit bonded to PPG block.Gas Permeation Chromatography indicated an increase in the number average molecular number (Mn)of PPG from 4000g/mol to 4600g/mol (PDI = 1.52). The cross-linked copolymer was identified using Fourier-Transform infrared spectroscopy.Absorption at 1690cm-1 indicates the presence of urethane carbonyl group and supported the existence of urethane links. The product was also characterized by Scanning Electron Microscope (SEM). SEM micrograph showedthat the cross-linked copolymer contains macro pores, which is typical from reaction employing glycerol as the cross-linking agent.

Original languageEnglish
Pages (from-to)624-629
Number of pages6
JournalInternational Journal of ChemTech Research
Volume8
Issue number12
Publication statusPublished - 2015

Fingerprint

Propylene Glycol
Glycols
Propylene
Copolymers
Block copolymers
Urethane
Glycerol
Electron microscopes
Scanning
Chromatography
dilactide
Permeation
Copolymerization
Fourier transform infrared spectroscopy
Macros
Gases
Polymerization
poly(lactide)

Keywords

  • Cross-link
  • Poly(D,L-lactide)
  • Poly(propylene glycol)
  • Triblock copolymer

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Preliminary study on the preparation of poly(D,L-lactide/propylene glycol) triblock and cross- linked copolymers. / Zainuddin, Ain Athirah; Manap, Siti Munirah; Anuar, Farah Hannan.

In: International Journal of ChemTech Research, Vol. 8, No. 12, 2015, p. 624-629.

Research output: Contribution to journalArticle

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AB - This study aims to improve the properties of poly(D,L-lactide) (PDLLA)through copolymerization with poly(propylene glycol)(PPG) followed by cross-linking process. Cross-linked copolymer poly(D,L-lactide/propylene glycol) with strong and elastic properties wasobtained in two steps. First step wasthe synthesis of PDLLA-PPG-PDLLA triblock copolymer via melt polymerization method. The second step was the cross-linking process where the triblock copolymers reacted with hexametylenediisocyanate (HMDI) as chain extender and glycerol as cross-link agent. The formation of triblock copolymer was identified from the presence of a signal at 4.3 ppm in the1H NMRspectrum which belongs to the PDLLA repeating unit bonded to PPG block.Gas Permeation Chromatography indicated an increase in the number average molecular number (Mn)of PPG from 4000g/mol to 4600g/mol (PDI = 1.52). The cross-linked copolymer was identified using Fourier-Transform infrared spectroscopy.Absorption at 1690cm-1 indicates the presence of urethane carbonyl group and supported the existence of urethane links. The product was also characterized by Scanning Electron Microscope (SEM). SEM micrograph showedthat the cross-linked copolymer contains macro pores, which is typical from reaction employing glycerol as the cross-linking agent.

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