Thermal analysis FTIR spectroscopy of poly(ε-caprolactone)

K. Phillipson, James Hay, Michael Jenkins

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
1073 Downloads (Pure)

Abstract

Vibrational spectra of poly(ε-caprolactone) have been measured as a function of temperature and time to assign the molecular origins of the absorption bands, to distinguish crystalline and amorphous bands and measure fractional crystallinity. While many changes occur within the spectrum on crystallization and melting those which occur to the carbonyl absorption band proved to be the most useful in determining the fractional crystallinity and following the development of crystallinity with time.
Two-dimensional IR correlation mapping applied to the carbonyl band clearly showed that the broad band at 1735 cm−1 was due to the stretching of the ester carbonyl group in the amorphous regions which decreased in intensity on isothermal crystallization. At the same time a narrower more intense band developed at 1725 cm−1 attributed to the absorption of the ester carbonyl group in the crystalline regions. Deconvoluting the band into these components enabled the intensities of the two to be determined and the fractional crystallinity measured.
Original languageEnglish
Pages (from-to)74-82
JournalThermochimica Acta
Volume595
Early online date27 Aug 2014
DOIs
Publication statusPublished - 10 Nov 2014

Keywords

  • Poly(ε-caprolactone)
  • Two-dimensional correlation spectroscopy
  • Synchronous and asynchronous mapping
  • Phase transitions

Fingerprint

Dive into the research topics of 'Thermal analysis FTIR spectroscopy of poly(ε-caprolactone)'. Together they form a unique fingerprint.

Cite this