The effect of fluorine-substituted acrylate monomers on the electro-optical and morphological properties of polymer dispersed liquid crystals |
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Authors: | M D Schulte S J Clarson L V Natarajan D W Tomlin T J Bunning |
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Institution: | 1. Department of Applied physics , North China Electric Power University , Baoding 071003, PR China ronghua_guan@sohu.com;3. Department of Applied physics , North China Electric Power University , Baoding 071003, PR China;4. Department of Applied Physics , Hebei University of Technology , Tianjin, 300130, PR China |
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Abstract: | The effects of fluorinated acrylate monomers on the electro-optical and morphological properties of polymer dispersed liquid crystal (PDLC) films are reported. The partial fluorination of host polymer matrices resulted in improved optical properties and better defined morphologies. An enhancement in contrast ratio was observed for fluorinated systems containing trifluoroethyl acrylate (TFEA) and hexafluoroisopropyl acrylate (HFIPA). Conversely, the incorporation of methyl acrylate (MA), a chemically similar non-fluorinated acrylate, resulted in no appreciable change in contrast ratio and an increase in relaxation time. Scanning electron microscopy morphological studies were conducted to understand further the influence of fluorinated monomers in PDLC systems. |
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Keywords: | liquid crystals metallomesogens fluoroalkylated metallomesogens platinum organyls ortho-metallation |
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