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Soft Materials Volume 12, 2014 - Issue 3
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Original Articles

Characterization and Morphology of Polymer-Dispersed Liquid Crystal Films

Mujtaba EllahiDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
Fang LiuDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
Ping SongDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
Yanzi GaoDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
M. Y. RafiqueDepartment of Physics, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
Dil Faraz KhanLaboratory of Particulate and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
,
Hui CaoDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
&
Huai YangDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China;Department of Materials science and Engineering, College of Engineering, Peking University, Beijing, People’s Republic of ChinaCorrespondence[email protected]
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Pages 339-345 | Received 02 Feb 2013, Accepted 20 May 2013, Published online: 06 Jun 2014
 
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Abstract

The electro-optical properties and reducing morphologies of the PDLC films were strongly influenced by the chemical structure of curable diglycidyl ether (DGEBA), and tri-functional trimethylol propane triglycidyl ether (TMPTGE) significantly. Higher driven voltage and contrast ratio were achieved when the PDLC films showed a reducing morphology with suitably distributed small holes of LC droplet size. The detailed characterization and morphology of polymer network of PDLC films were analyzed by employing liquid crystal device (LCD) parameters tester, UV-VIS-NIR spectrophotometer, an Abbe Refractometer, and scanning electron microscopy (SEM). Meanwhile, for PDLCs with a certain amount of LC; the microstructure and the refractive index of polymer networks could be influenced by decreasing the composition ratio of monomers ethylene glycol diglycidyl ether (EGDE) and polyethylene glycol diglycidyl ether (PEGDE).

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