Structure control of lattice-patterned liquid crystals–polymer composites prepared by polarization-selective UV-curing through the addition of a fluorinated acrylate monomer

2013 ◽  
Vol 103 ◽  
pp. 42-48 ◽  
Author(s):  
Shi-Joon Sung ◽  
Eun-Ae Jung ◽  
Kyoseung Sim ◽  
Dae-Hwan Kim ◽  
Kuk Young Cho
Keyword(s):  
Liquid Crystals ◽  
Polymer Composites ◽  
Uv Curing ◽  
Acrylate Monomer ◽  
Fluorinated Acrylate ◽  
Structure Control

Nano-Sized Fine Droplets of Liquid Crystals for Optical Application

1996 ◽  
Vol 457 ◽  
Author(s):  
Shiro Matsumoto ◽  
Marthe Houlbert ◽  
Takayoshi Hayashi ◽  
Ken-ichi Kubodera
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Liquid Crystals ◽  
Electric Field ◽  
Applied Voltage ◽  
Applied Electric Field ◽  
Uv Curing ◽  
Infrared Region ◽  
High Transparency ◽  
Power Change

ABSTRACTNano-sized fine droplets of liquid crystal (LC) were obtained by phase separation of nematic LC in UV curing polymer. The polymer composite had a high transparency in the infrared region. The fine droplets responded to an electric field causing a change in birefringence. Output power change was brought about by the generated retardation between two polarizations, parallel and perpendicular to the applied electric field. This differs from the composite containing much larger droplets, where output depends on the degree of scattering. The birefringence changed by 0.001 at the applied voltage of 7.5 V/μm.

Electrically switchable reflection gratings in polymer dispersed liquid crystals

1999 ◽  
Vol 559 ◽  
Author(s):  
L. V. Natarajan ◽  
R. L. Sutherland ◽  
V. P. Tondiglia ◽  
S. Siwecki ◽  
R. Pogue ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Field ◽  
Low Voltage ◽  
Blue Shift ◽  
Maximum Efficiency ◽  
Acrylate Monomer ◽  
Polymer Dispersed ◽  
Reflection Gratings ◽  
Grating Formation

ABSTRACTElectrically switchable volume reflection holograms were written by inhomogeneous illumination of a prepolymer syrup containing a nematic liquid crystal and a multifunctional acrylate monomer. Switchable holograms are diffractive optics structures and the diffraction efficiency can be controlled by the application of an electric field. Reflection gratings with grating spacing varying between 0.16-0.27 µm were made during the phase separation of liquid crystals from the fast curing prepolymer syrup. The reflection efficiency of the holograms were electrically modulated with the applied field of ∼10-15V/µm. Real time study of the grating formation revealed that the maximum efficiency is reached in ∼15 seconds. The shrinkage of the host polymer during grating formation resulted in the blue shift of the reflection notch. The response time of the grating in an electric field is ∼50 µs. Low voltage scanning electron microscope studies showed the presence of discrete nematic droplet domains of sizes 30-60 nm in liquid crystal rich region.

scholarly journals Pixel-isolation liquid crystals formed by polarization-selective UV-curing of a prepolymer containing cinnamate oligomer

2010 ◽  
Vol 18 (11) ◽  
pp. 11737 ◽  
Author(s):  
Shi-Joon Sung ◽  
Eun Ae Jung ◽  
Dae-Hwan Kim ◽  
Dae-Ho Son ◽  
Jin-Kyu Kang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Uv Curing

Thermal and flame retardant properties of transparent UV-curing epoxy acrylate coatings with POSS-based phosphonate acrylate

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75254-75262 ◽  
Author(s):  
Bin Yu ◽  
Youji Tao ◽  
Lu Liu ◽  
Yongqian Shi ◽  
Hongyu Yang ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Uv Curing ◽  
Epoxy Acrylate ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Ultraviolet Curing ◽  
Acrylate Monomer ◽  
Flame Retardant Properties

A novel branched phosphonate acrylate monomer containing phosphorus and polyhedral oligomeric silsesquioxanes was successfully synthesized and then incorporated into epoxy acrylate resins in different ratios using ultraviolet curing technology.

scholarly journals Exploration of immobilization conditions of cellulosic lyotropic liquid crystals in monomeric solvents by in situ polymerization and achievement of dual mechanochromism at room temperature

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 24724-24730 ◽  
Author(s):  
K. Miyagi ◽  
Y. Teramoto
Keyword(s):  
Liquid Crystals ◽  
Polymer Composites ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
In Situ Polymerization ◽  
Synthetic Polymer ◽  
Lyotropic Liquid Crystals ◽  
Liquid Crystalline Structure ◽  
Cholesteric Liquid Crystalline

We obtained cellulosic/synthetic polymer composites incorporating a cholesteric liquid crystalline structure by in situ polymerization and accomplished dual mechanochromism at room temperature.

An elegant and facile single-step UV-curing approach to surface nano-silvering of polymer composites

Soft Matter ◽  
2010 ◽  
Vol 6 (19) ◽  
pp. 4666 ◽  
Author(s):  
Vijaykumar S. Ijeri ◽  
Jijeesh R. Nair ◽  
Claudio Gerbaldi ◽  
Renato S. Gonnelli ◽  
Silvia Bodoardo ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Uv Curing ◽  
Single Step
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