Effect of Alignment Layer on Electro-Optic Properties of Polymer-Dispersed Liquid Crystal Displays

No, Young-Seok; Jeon, Chan‐Wook

doi:10.1080/15421400903195759

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…One of the most important factors determining the electro-optical properties of PDLC is its morphology which is strongly affected by the prepolymer composition, solubility between the LC and prepolymer, the polymerization kinetics, and the phase separation mechanism [17][18][19][20][21][22][23][24][25][26][27]. For the PDLC films prepared using thiolene systems, the droplet morphology and structural parameters such as droplet size, shape, distribution and density can be varied with the chemical characteristics of the prepolymer and polymerization kinetics.…”

Section: Introductionmentioning

confidence: 99%

Effects of Molar Ratios of Thiol-Ene Monomers on the Morphology and Electro-Optical Properties of Polymer Dispersed Liquid Crystal Films

Park¹,

Cho²,

Hong³

2013

OJOPM

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We synthesized tetrafunctional allyl ether monomer (4-AE) and investigated the effects of the different molar ratios of trimethylolpropane tris-(3-mercaptopropionate) (3-SH) to 4-AE on the photopolymerization behavior, morphology, and electro-optical properties of thiol-ene-based PDLC films. Photo-DSC and DSC analyses revealed that the PDLC sample containing 45 wt% 3-SH and 45 wt% 4-AE gave the highest exotherm, the fastest photocure rate, and the highest T g due to the matched stoichiometry. Morphological observations and electro-optical measurements showed that the PDLC sample with the matched molar ratio gave the smallest LC droplet size, the highest threshold, driving voltages, and lowest saturation transmittance because the orientation of LC molecules got difficulty in small droplets. The stoichiometric ratios of 3-SH to 4-AE played an important role in controlling the photocure rate, phase separation rate, microstructures of LC droplets, and electro-optical properties of thiol-ene-based PDLC systems.

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Section: Introductionmentioning

confidence: 99%

Effects of Molar Ratios of Thiol-Ene Monomers on the Morphology and Electro-Optical Properties of Polymer Dispersed Liquid Crystal Films

Park¹,

Cho²,

Hong³

2013

OJOPM

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Optimization of LC droplet size and electro‐optical properties of acrylate‐based polymer‐dispersed liquid crystal by controlling photocure rate

Cho

Lee

Park

et al. 2013

J of Applied Polymer Sci

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We investigated the effects of the different content ratios of 2-ethylhexylacrylate (2-EHA) and 2-ethylhexylmethacrylate (2-EHMA) on the relationships among the photopolymerization rate, morphology of liquid crystals (LCs) droplets, and electrooptical properties of trifunctional urethane acrylate-based polymer-dispersed liquid crystal (PDLC) systems. Photo-differential scanning calorimetry (DSC) analysis and resistivity measurement revealed that increasing 2-EHMA content gradually decreased the photocure rate of trifunctional urethane acrylate-based PDLCs, which prolonged the phase separation between the LC molecules and the prepolymers. Morphological observations and electro-optical measurements demonstrated that trifunctional urethane acrylate-based PDLCs with the 2-EHA:2-EHMA ratios from 4:1 to 3:2 in weight percent formed the favorable microstructures of LC droplets being within the range of 1-5 mm to scatter light efficiently and showed the satisfactory off-state opacity and on-state transmittance and the relatively low-driving voltage. The microstructures of LC droplets and electro-optical properties of trifunctional urethane acrylatebased PDLCs could be usefully optimized by controlling the photocure rate using the different 2-EHA/2-EHMA content ratios.

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Photocure kinetics and control of LC microdroplets for acrylate-based polymer dispersed liquid crystal with different methacrylate contents

Cho¹,

Lee²,

Kim³

et al. 2013

Macromol. Res.

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Effect of Alignment Layer on Electro-Optic Properties of Polymer-Dispersed Liquid Crystal Displays

Cited by 5 publications

References 4 publications

Effects of Molar Ratios of Thiol-Ene Monomers on the Morphology and Electro-Optical Properties of Polymer Dispersed Liquid Crystal Films

Effects of Molar Ratios of Thiol-Ene Monomers on the Morphology and Electro-Optical Properties of Polymer Dispersed Liquid Crystal Films

Optimization of LC droplet size and electro‐optical properties of acrylate‐based polymer‐dispersed liquid crystal by controlling photocure rate

Photocure kinetics and control of LC microdroplets for acrylate-based polymer dispersed liquid crystal with different methacrylate contents

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