Characteristics of a bi-Dimensional Structure in Twist Cells with Nematic Liquid Crystals

Nasta, L.; Lupu, A.; Beica, T.; Serban, T.; Matei, Lidia; Giurgea, M.

doi:10.1080/00268947908083991

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…The same photograph also illustrates the oscillation of the remaining segments of Williams domains out of the y direction. Nasta et al 31 pointed out that a possible precursor to the FWD pattern can be observed for MBBA in twist cells. As illustrated in Figure 3, this consists of irregular columns of discontinuities in the WD pattern.…”

Section: Resultsmentioning

confidence: 99%

Electrohydrodynamic instabilities in the nematic phase of a homopolyester from 4,4'-dihydroxy-.alpha.-methylstilbene

Krigbaum¹,

Grantham²,

Toriumi³

1982

Macromolecules

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Electric field induced flow instabilities are examined for a nematogenic homopolyester of low molecular weight, P-6, synthesized from 4,4'-dihydroxy-a-methylstilbene and adipic acid. The observations for P-6 are compared with the behavior of the low molecular weight nematogen (p-methoxybenzylidene)-pn-butylaniline (MBBA) and with those reported previously for a high molecular weight nematogenic copolyester, T2/60. In the conduction regime, P-6 forms a fluctuating Williams domain pattern in a few tenths of a second, while some hours are required to form a Williams domain pattern in T2/60. P-6 also differs from T2/60 in exhibiting a dynamic scattering mode. At threshold this pattern has a formation time of several seconds, which allows examination of its precursor pattern.

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Section: Resultsmentioning

confidence: 99%