Smectic rheology

Ralph H. Colby, Christopher K. Ober, Jeffery R. Gillmor, Richard W. Connelly, Tony Duong, Giancarlo Galli, Michele Laus

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We have studied the oscillatory shear response of three thermotropic smectic-A liquid crystalline materials with no external aligning field (other than the necessary presence of rheometer plates). Two are polymers (one main-chain and one side-chain) and the other is a small molecule smectic. All three exhibit the classical linear response to oscillatory shear characteristic of a viscoelastic solid at sufficiently small strain amplitudes and frequencies. However, for strain amplitudes exceeding a small critical value, these materials exhibit a strongly nonlinear response to strain, which is characterized in detail. While the low-strain moduli and the critical strain of the three smectics are considerably different, the nonlinear response has some universal character which is presumably related to the low energy for the formation of defects in smectic liquid crystals.

Original languageEnglish (US)
Pages (from-to)498-504
Number of pages7
JournalRheologica Acta
Volume36
Issue number5
DOIs
StatePublished - Jan 1 1997

Fingerprint

Rheology
rheology
shear
rheometers
Smectic liquid crystals
Liquid Crystals
Rheometers
liquid crystals
Polymers
defects
polymers
Crystalline materials
liquids
Defects
Molecules
Liquids
molecules
energy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Colby, R. H., Ober, C. K., Gillmor, J. R., Connelly, R. W., Duong, T., Galli, G., & Laus, M. (1997). Smectic rheology. Rheologica Acta, 36(5), 498-504. https://doi.org/10.1007/BF00368127
Colby, Ralph H. ; Ober, Christopher K. ; Gillmor, Jeffery R. ; Connelly, Richard W. ; Duong, Tony ; Galli, Giancarlo ; Laus, Michele. / Smectic rheology. In: Rheologica Acta. 1997 ; Vol. 36, No. 5. pp. 498-504.
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Colby, RH, Ober, CK, Gillmor, JR, Connelly, RW, Duong, T, Galli, G & Laus, M 1997, 'Smectic rheology', Rheologica Acta, vol. 36, no. 5, pp. 498-504. https://doi.org/10.1007/BF00368127

Smectic rheology. / Colby, Ralph H.; Ober, Christopher K.; Gillmor, Jeffery R.; Connelly, Richard W.; Duong, Tony; Galli, Giancarlo; Laus, Michele.

In: Rheologica Acta, Vol. 36, No. 5, 01.01.1997, p. 498-504.

Research output: Contribution to journalArticle

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AU - Colby, Ralph H.

AU - Ober, Christopher K.

AU - Gillmor, Jeffery R.

AU - Connelly, Richard W.

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AU - Galli, Giancarlo

AU - Laus, Michele

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Colby RH, Ober CK, Gillmor JR, Connelly RW, Duong T, Galli G et al. Smectic rheology. Rheologica Acta. 1997 Jan 1;36(5):498-504. https://doi.org/10.1007/BF00368127