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FARZANA AHMAD1, KIM EUN JEE1, YOUNG JAE JEON1, MUHAMMAD JAMIL2,3,*
- LCD Research Center, Department of Chemistry, Konkuk University, Seoul 05029, Korea
- Division of Global Business, Konkuk University, Seoul 05029, Korea
- Department of Physics, Konkuk University, Seoul 05029, Korea
This study is performed to explore the alteration of flexibility and solubility of polymer matrix in polymer dispersed liquid crystal (PDLC) films via electrically-optically variations and change in glass transitions temperatures. Following PDLC cell is formed by photo induced phase separation method, in which a mixture of thiolene-isocyanate-ether based monomer is crosslinked with polyoxamer with various weight ratios. The characteristics of resulting PDLC devices have been determined through latest techniques. The droplet size variations have been determined through scanning electron microscope (SEM) and exhibited an increase with rise in polyoxamer ratio. Current electro optical studies revealed a decrease in threshold voltage and increase in the contrast ratio with higher contents of polyoxamer. Beside this, the optimal electro optical properties, a decrease in glass transition temperature for thiolene based polymer matrix has been observed with growth in amount of polyoxamer. This behavior was due to hydrophobic characteristics of polyoxamer material which showed less attractions towards the thiolene polymer matrix. Thus, it gave a competent degree of phase separation, and boosted the flexibility of polymer matrix that resulted into rise of free volume. Consequently, such findings suggest the usage of this material which enhances PDLC electro optical performance with scrupulous concentrations..
Thiolene monomer, Glass transition temperature, Polymer dispersed liquid crystal, Electro-optical properties.
Submitted at: March 5, 2018
Accepted at: Aug. 9, 2018
FARZANA AHMAD, KIM EUN JEE, YOUNG JAE JEON, MUHAMMAD JAMIL, Investigation of thiolene based polymer matrix crosslinked with polyoxamer in Polymer dispersed liquid crystal display, Journal of Optoelectronics and Advanced Materials Vol. 20, Iss. 7-8, pp. 419-424 (2018)
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