Molecular organisation of polymer backbone in side-group liquid crystal polymers. ESR study of spin-labelled and spin-probed side-group liquid crystal polymers

C. T. Imrie*, D. Ionescu, G. R. Luckhurst

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

The orientational order of a nematic liquid crystal side group copolymer aligned in a magnetic field has been investigated using ESR spectroscopy. We find that the mesogenic groups are highly oriented parallel to the director whereas the polymer backbone appears to be randomly distributed or disordered. The ESR spectra of both spin probed and spin labelled systems were recorded in their glassy nematic states at room temperature as a function of the angle between the director and the magnetic field. The spectra for the spin probe dissolved in the copolymer show that the spin probe has a high orientational order and by implication that the mesogenic side groups are highly ordered. The ESR spectra of the spin labelled copolymer indicate that the orientational order for the label and so presumably the polymer backbone is zero.

Original languageEnglish
Pages (from-to)232-235
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3319
DOIs
Publication statusPublished - 1 Dec 1997
EventLiquid Crystals: Chemistry and Structure - Zakopane, Poland
Duration: 3 Mar 19978 Mar 1997

Keywords

  • ESR
  • Mesogenic groups
  • Order parameter
  • Polymer backbone
  • Side group liquid crystal polymer
  • Spin labelled
  • Spin-probed

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Molecular organisation of polymer backbone in side-group liquid crystal polymers. ESR study of spin-labelled and spin-probed side-group liquid crystal polymers'. Together they form a unique fingerprint.

  • Cite this