Polymer Matrix on Polymer Dispersed Liquid Crystals Electro-Optical Properties

Huey Ling Chang; Chih Ming Chen

doi:10.4028/www.scientific.net/AMR.677.183

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Spray Deposited Thin Films of Tin-Doped Indium Oxide for Optoelectronic Applications
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Numerical Simulation on Forming Behavior of Magnesium Alloy at Elevated Temperatures with Experimental Verification
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Polymer Matrix on Polymer Dispersed Liquid Crystals Electro-Optical Properties
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Flow Behavior and Microstructural Evolution of 316 Stainless Steel under Hot Compression
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Comparative Study on the Effective Dielectric Constant of the Graded Composites
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Curing Behavior of Epoxy Resin Mixed with Epoxypropoxypropyl Terminated Polydimethylsiloxane
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The Effect on a New Sintered Calcium Sulfate Ceramic to Osteoprogenitor MC 3T3-E1
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 677Polymer Matrix on Polymer Dispersed Liquid...

Polymer Matrix on Polymer Dispersed Liquid Crystals Electro-Optical Properties

Abstract:

Polymer dispersed liquid crystal (PDLC) films are fabricated with various compositions of E7 liquid crystal (LC), 2-Hydroxy ethyl methacrylate (HEMA), Methyl methacrylate (MMA), n-butyl methacrylate (nBMA), Ethyl methacrylate (EMA), Tetraethylene glycol diacrylate (TEGDA), and Benzoin. The results show that the refractive index of the PDLC films is insensitive to the monomer side groups. The effects of different monomers addition on the microstructure, the corresponding polymer matrix motion and electro-optical properties of the PDLC samples are examined using Dynamic Mechanical Analyzers (DMA) and UV-Vis spectroscopy, respectively. The experimental results reveal that the addition of HEMA and TEGDA yields a considerable improvement in the electro-optical properties and the contrast ratio. Overall, the results show that a PDLC comprising 40wt% E7 liquid crystals, 50mol% TeGDA and 50mol% HEMA has both a high contrast ratio (12.75:1) and a low driving voltage (16 V), and is therefore a suitable candidate for smart window and a wide variety of intelligent photoelectric applications.