Effect of Composition and Regulators of the Molecular Weight and Structural Characteristics of (meth)acrylic Copolymer on the Electro-Optical Properties of the PDLC Films

Anisimov, A. N.; Shkirmantova, D. S.; Bulgakova, S. A.; Ryabov, S. A.; Jones, M.M.

doi:10.18083/lcappl.2016.1.42

Cited by 2 publications

(5 citation statements)

References 10 publications

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“…This interval is determined as

Δ T = T^{* *} - T^{*}

. Here

T^{* *}

and

T^{*}

are the high and low temperature limits of the heterophase region, respectively . At

T^{*}

, low temperature phase (i.e., N mesophase) is stable, but the high temperature phase (i.e., isotropic liquid) is metastable.…”

Section: Resultsmentioning

confidence: 99%

“…The order parameter can be defined as a field fixed at each point of liquid crystalline mesophase and describing its state in each definite point. As known, [2,37,38] the orientational order parameter for the cylindrically symmetric molecules is defined as…”

Section: Prefatory Remarksmentioning

confidence: 99%

“…Here T * * and T * are the high and low temperature limits of the heterophase region, respectively. [2, [39][40][41][42][43] At T * , low temperature phase (i.e., N mesophase) is stable, but the high temperature phase (i.e., isotropic liquid) is metastable. At T * * , high temperature phase (i.e., isotropic liquid) is stable, but the low temperature phase (i.e., N mesophase) is metastable.…”

Section: Qualitative and Quantitative Observationsmentioning

confidence: 99%

“…Taking into considerations the elastic constant of N mesophase of MBBA, which is typical for thermotropic N mesophase, as K 10 -11 N [15,38,[51][52][53][54][55][56] and distance between the singular points as 6.5 µm (Figure 5), the mean interaction force for these singular points was determined as F 12 = 0.966 × 10 -5 N m -1 . The mean velocity of rapprochement of these singular points was estimated as = 1.6 × 10 -6 m s -1 .…”

Section: Qualitative and Quantitative Observationsmentioning

confidence: 99%

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Peculiarities of Defective Formations in Heterophase Regions of the Thermotropic Phase Transitions in Liquid Crystals

Nesrullajev

2019

Crystal Research and Technology

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A unique feature of phase transitions in liquid crystalline materials is the availability of heterophase regions. In such regions, the simultaneous coexistence of high temperature and low temperature phases takes place. Thermal mobility and temperature gradient in the heterophase regions lead to the appearance of various types of defective formations in the aligned and non‐aligned textures of liquid crystalline materials. In the present work, the morphologic, structural, and optical peculiarities of defective formations and non‐homogeneities, which appear in the heterophase regions of phase transitions, are investigated. The singular points, disclination, inversion walls, droplets, and confocal formations are objects of the investigations herein. The heterophase regions of the direct and reverse nematic ↔ isotropic liquid and smectic A ↔ isotropic liquid, smectic C ↔ isotropic liquid, and smectic C* ↔ isotropic liquid thermotropic phase transitions are created by the original method, that is, the capillary temperature wedge method. Crystallo‐optics and crystallo‐physics methods are used in this work.

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“…This interval is determined as

Δ T = T^{* *} - T^{*}

. Here

T^{* *}

and

T^{*}

are the high and low temperature limits of the heterophase region, respectively . At

T^{*}

, low temperature phase (i.e., N mesophase) is stable, but the high temperature phase (i.e., isotropic liquid) is metastable.…”

Section: Resultsmentioning

confidence: 99%

Section: Prefatory Remarksmentioning

confidence: 99%

Section: Qualitative and Quantitative Observationsmentioning

confidence: 99%

Section: Qualitative and Quantitative Observationsmentioning

confidence: 99%

See 2 more Smart Citations

Peculiarities of Defective Formations in Heterophase Regions of the Thermotropic Phase Transitions in Liquid Crystals

Nesrullajev

2019

Crystal Research and Technology

View full text Add to dashboard Cite

show abstract

“…The thermal hysteresis for phase transitions has been observed by different scientists in various liquid crystalline materials [48][49][50][51][52][53][54][55][56][57][58]. As is known, availability of the thermal hysteresis in liquid crystals is typical for the first order transitions [1,[59][60][61][62][63][64].…”

Section: Romentioning

confidence: 99%

Study of mesomorphism, thermotropic properties and pitch in new chiral smectogenic imine compounds

Nesrullajev

Eran

2015

Journal of Molecular Liquids

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Effect of Composition and Regulators of the Molecular Weight and Structural Characteristics of (meth)acrylic Copolymer on the Electro-Optical Properties of the PDLC Films

Cited by 2 publications

References 10 publications

Peculiarities of Defective Formations in Heterophase Regions of the Thermotropic Phase Transitions in Liquid Crystals

Peculiarities of Defective Formations in Heterophase Regions of the Thermotropic Phase Transitions in Liquid Crystals

Study of mesomorphism, thermotropic properties and pitch in new chiral smectogenic imine compounds

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