Synthesis, characterization, and stability of poly[(alkylene oxide) ester] thermoplastic elastomers

Simon McCarthy, Gordon F. Meijs, Pathiraja Gunatillake

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Poly(ether ester) block copolymers were prepared using a transesterification/ polycondensation bulk synthesis with systematic control of the terephthalic acid/butanediol aromatic diester block ('hard segment') and with poly(tetramethylene oxide) [PTMO], poly(hexamethylene oxide) [PHMO], or poly(decamethylene oxide) [PDMO] poly(alkylene oxide) soft segments. The respective number average molecular weights were 980, 930, and 940 Da. A series of the poly(ether ester)s with hard segment fractions of 25, 29, 37, and 51% were prepared. One example of the PDMO polyester was prepared at a 51% hard segment fraction. The polyesters were characterized using viscometry, gel permeation chromatography, 1H-NMR spectroscopy, differential scanning calorimetry, and tensile testing. The novel poly (ether ester)s, the PTMO polyester, and the commercial control, Hytrel® 4056, were compared for their resistance to degradation in a 50% aqueous hydrogen peroxide solution at 37°C, boiling water buffered at pH 1 and 13, an oxygen stream at 200°C, and a nitrogen stream at 200°C. The Hytrel® 4056 and the PTMO polyesters fragmented in hydrogen peroxide within 24 h while the PHMO and PDMO polyesters were much less degraded. Resistance to hydrolytic and thermal degradation increased as the ratio of aliphatic methylene to ether increased: PTMO <PHMO <PDMO. Samples containing higher hard segment fractions demonstrated improved resistance to hydrolysis.

Original languageEnglish (US)
Pages (from-to)1319-1332
Number of pages14
JournalJournal of Applied Polymer Science
Volume65
Issue number7
StatePublished - Aug 15 1997
Externally publishedYes

Fingerprint

Thermoplastic elastomers
Polyesters
Oxides
Esters
Ether
Hydrogen Peroxide
Butylene Glycols
Ethers
Transesterification
Viscosity measurement
Tensile testing
Gel permeation chromatography
Polycondensation
Boiling liquids
Nuclear magnetic resonance spectroscopy
Block copolymers
Differential scanning calorimetry
Hydrolysis
Pyrolysis
Nitrogen

Keywords

  • Degradation
  • Poly(decamethylene oxide)
  • Poly(hexamethylene oxide)
  • Poly(tetramethylene oxide)
  • Poly[(alkylene oxide) ester]
  • Thermoplastic elastomer

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Synthesis, characterization, and stability of poly[(alkylene oxide) ester] thermoplastic elastomers. / McCarthy, Simon; Meijs, Gordon F.; Gunatillake, Pathiraja.

In: Journal of Applied Polymer Science, Vol. 65, No. 7, 15.08.1997, p. 1319-1332.

Research output: Contribution to journalArticle

McCarthy, Simon ; Meijs, Gordon F. ; Gunatillake, Pathiraja. / Synthesis, characterization, and stability of poly[(alkylene oxide) ester] thermoplastic elastomers. In: Journal of Applied Polymer Science. 1997 ; Vol. 65, No. 7. pp. 1319-1332.
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