Liquid crystal alignment properties of 2-naphthoxymethyl-substituted polystyrenes |
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| Authors: | Hyo Kang Jin Seol Park Daeseung Kang |
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| Institution: | 1. Department of Chemical and Biological Engineering , Seoul National University , Sillim-9-Dong, Gwanak-Gu, Seoul, 151-744, Korea;2. Department of Electrical Engineering , Soongsil University , 511 Sangso-Dong, Dongjak-Gu, Seoul, 156-743, Korea |
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| Abstract: | The liquid crystal (LC) alignment properties of LC cells fabricated with films of 2-naphthoxymethyl-substituted polystyrenes with different contents of naphthoxymethyl side groups were investigated. The polymer films exhibited good optical transparency in the visible light region (400–700 nm). The LC cells made from the unrubbed films of polymers having more than 57 mol%?of 2-naphthoxymethyl containing monomeric units showed homeotropic LC alignment with a high pretilt angle of about 90o. Good electro-optical characteristics, such as the threshold voltage, response time, voltage holding ratio and residual DC voltage were observed for the LC cells fabricated with the polymer having 100 mol%?of 2-naphthoxymethyl containing monomeric units as an LC alignment layer. |
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| Keywords: | liquid crystal alignment electro-optical property polystyrene |
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