Photo-induced liquid crystal alignment on polyimide containing fluorinated groups

Shi Joon Sung; Jong Woo Lee; Hee Tak Kim; Jung Ki Park

doi:10.1080/02678290110093804

Photo-induced liquid crystal alignment on polyimide containing fluorinated groups

Shi Joon Sung, Jong Woo Lee, Hee Tak Kim, Jung Ki Park

Division of Energy Techonology

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Polyimides were prepared from pyromellitic dianhydride, 4,4′-bis[2-(4-aminophenyl)hexafluoroprop-2-yl]diphenyl ether and 4,4′-diamodiphenyl ether (PMDA-BDAF-ODA) and used for liquid crystal alignment using linearly polarized UV exposure. The alignment properties of a LC on the polyimide films were found to depend on the fluorine content in the PMDA-BDAF-ODA alignment layer and on the UV exposure time. Pretilt angles were obtained in the range 0° to 90° dependent upon the fluorine content in the polyimide film and the UV exposure time. These effects seem to be closely related to the surface energy of the photo-alignment layer.

Original language	English
Pages (from-to)	243-250
Number of pages	8
Journal	Liquid Crystals
Volume	29
Issue number	2
DOIs	https://doi.org/10.1080/02678290110093804
State	Published - 2002

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title = "Photo-induced liquid crystal alignment on polyimide containing fluorinated groups",

abstract = "Polyimides were prepared from pyromellitic dianhydride, 4,4′-bis[2-(4-aminophenyl)hexafluoroprop-2-yl]diphenyl ether and 4,4′-diamodiphenyl ether (PMDA-BDAF-ODA) and used for liquid crystal alignment using linearly polarized UV exposure. The alignment properties of a LC on the polyimide films were found to depend on the fluorine content in the PMDA-BDAF-ODA alignment layer and on the UV exposure time. Pretilt angles were obtained in the range 0° to 90° dependent upon the fluorine content in the polyimide film and the UV exposure time. These effects seem to be closely related to the surface energy of the photo-alignment layer.",

author = "Sung, \{Shi Joon\} and Lee, \{Jong Woo\} and Kim, \{Hee Tak\} and Park, \{Jung Ki\}",

year = "2002",

doi = "10.1080/02678290110093804",

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journal = "Liquid Crystals",

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T1 - Photo-induced liquid crystal alignment on polyimide containing fluorinated groups

AU - Sung, Shi Joon

AU - Lee, Jong Woo

AU - Kim, Hee Tak

AU - Park, Jung Ki

PY - 2002

Y1 - 2002

N2 - Polyimides were prepared from pyromellitic dianhydride, 4,4′-bis[2-(4-aminophenyl)hexafluoroprop-2-yl]diphenyl ether and 4,4′-diamodiphenyl ether (PMDA-BDAF-ODA) and used for liquid crystal alignment using linearly polarized UV exposure. The alignment properties of a LC on the polyimide films were found to depend on the fluorine content in the PMDA-BDAF-ODA alignment layer and on the UV exposure time. Pretilt angles were obtained in the range 0° to 90° dependent upon the fluorine content in the polyimide film and the UV exposure time. These effects seem to be closely related to the surface energy of the photo-alignment layer.

AB - Polyimides were prepared from pyromellitic dianhydride, 4,4′-bis[2-(4-aminophenyl)hexafluoroprop-2-yl]diphenyl ether and 4,4′-diamodiphenyl ether (PMDA-BDAF-ODA) and used for liquid crystal alignment using linearly polarized UV exposure. The alignment properties of a LC on the polyimide films were found to depend on the fluorine content in the PMDA-BDAF-ODA alignment layer and on the UV exposure time. Pretilt angles were obtained in the range 0° to 90° dependent upon the fluorine content in the polyimide film and the UV exposure time. These effects seem to be closely related to the surface energy of the photo-alignment layer.

UR - https://www.scopus.com/pages/publications/0036154655

U2 - 10.1080/02678290110093804

DO - 10.1080/02678290110093804

M3 - Article

AN - SCOPUS:0036154655

SN - 0267-8292

VL - 29

SP - 243

EP - 250

JO - Liquid Crystals

JF - Liquid Crystals

IS - 2

ER -

Photo-induced liquid crystal alignment on polyimide containing fluorinated groups

Abstract

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