NMR study of flow and viscoelastic properties of PBLG/m-Cresol lyotropic liquid crystal

NMR study of flow and viscoelastic properties of PBLG/m-Cresol lyotropic liquid crystal

Director distortion patterns and backflow effects in transient flows of nematic solutions of PBLG/m-cresol are studied by deuteron NMR. The simulation of the observed NMR spectra as a function of time allows to characterise the director field pattern and to evaluate most of the viscoelastic properti...

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Veröffentlicht in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 1999, Vol.331, p.499-507
Hauptverfasser: Veron, Alain, Gomes, Alexandre E., Marques Mendes Almeida da Rosa Leal, Catarina, Klink, Jacques Van Der, Martins, Assis F.
Format: Artikel
Sprache:eng
Schlagworte:
Liquid crystal polymer
PBLG
Viscoelasticity
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Zusammenfassung:Director distortion patterns and backflow effects in transient flows of nematic solutions of PBLG/m-cresol are studied by deuteron NMR. The simulation of the observed NMR spectra as a function of time allows to characterise the director field pattern and to evaluate most of the viscoelastic properties of the system. A good agreement with classical rheometry is observed.
ISSN:1563-5287