Crystal and molecular structure of the thioether-analogue of PEEK from X-ray powder data and diffraction-modelling

Howard M. Colquhoun, Peter L. Aldred, Allan S. Hay, Antisar Rih Hlil, Kenji Miyatake, David J. Williams

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Analysis of X-ray powder data for the melt-crystallisable aromatic poly(thioether thioether ketone) [-S-Ar-S-Ar-CO-Ar]n, ('PTTK', Ar=1,4-phenylene), reveals that it adopts a crystal structure very different from that established for its ether-analogue PEEK. Molecular modelling and diffraction-simulation studies of PTTK show that the structure of this polymer is analogous to that of melt-crystallised poly(thioetherketone) [-S-Ar-CO-Ar]n in which the carbonyl linkages in symmetry-related chains are aligned anti-parallel to one another, and that these bridging units are crystallographically interchangeable. The final model for the crystal structure of PTTK is thus disordered, in the monoclinic space group I2/a (two chains per unit cell), with cell dimensions a=7.83, b=6.06, c=10.35 Å, β=93.47°.

Original languageEnglish
Pages (from-to)585-590
Number of pages6
JournalPolymer
Volume47
Issue number2
DOIs
Publication statusPublished - 2006 Jan 13
Externally publishedYes

Keywords

  • Crystal structure
  • Poly(thioether thioether ketone)
  • X-ray

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Crystal and molecular structure of the thioether-analogue of PEEK from X-ray powder data and diffraction-modelling'. Together they form a unique fingerprint.

Cite this