Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers

Jeoung Yeon Hwang; Dae Shik Seo; Jong Ho Son; Dong Hack Suh

doi:10.1143/jjap.40.l761

Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers

Jeoung Yeon Hwang, Dae Shik Seo, Jong Ho Son, Dong Hack Suh

Department of Electrical and Electronic Engineering

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

8 Citations (Scopus)

Abstract

We synthesized the various new photo-crosslinkable polyimide based polymers and generation of pretilt angle for a nematic liquid crystal (NLC) using a photodimerization method on the photopolymers was studied. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450°C. The NLC pretilt angle generated was about 2.5°-3.0° by polarized UV exposure on the photopolymers containing a biphenyl (BP), decyl (De), and cholesteryl(chol), chalcone(Chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing the fluorine and chalcone group. The NLC pretilt angle generated is attributed to the biphenyl and alkyl moieties, and the photo-dimerized chalcone group of the photopolymer.

Original language	English
Pages (from-to)	L761-L764
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	40
Issue number	7 B
DOIs	https://doi.org/10.1143/jjap.40.l761
Publication status	Published - 2001 Jul 15

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

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title = "Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers",

abstract = "We synthesized the various new photo-crosslinkable polyimide based polymers and generation of pretilt angle for a nematic liquid crystal (NLC) using a photodimerization method on the photopolymers was studied. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450°C. The NLC pretilt angle generated was about 2.5°-3.0° by polarized UV exposure on the photopolymers containing a biphenyl (BP), decyl (De), and cholesteryl(chol), chalcone(Chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing the fluorine and chalcone group. The NLC pretilt angle generated is attributed to the biphenyl and alkyl moieties, and the photo-dimerized chalcone group of the photopolymer.",

author = "Hwang, {Jeoung Yeon} and Seo, {Dae Shik} and Son, {Jong Ho} and Suh, {Dong Hack}",

year = "2001",

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doi = "10.1143/jjap.40.l761",

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journal = "Japanese Journal of Applied Physics, Part 2: Letters",

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Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers. / Hwang, Jeoung Yeon; Seo, Dae Shik; Son, Jong Ho; Suh, Dong Hack.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 40, No. 7 B, 15.07.2001, p. L761-L764.

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

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AU - Suh, Dong Hack

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N2 - We synthesized the various new photo-crosslinkable polyimide based polymers and generation of pretilt angle for a nematic liquid crystal (NLC) using a photodimerization method on the photopolymers was studied. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450°C. The NLC pretilt angle generated was about 2.5°-3.0° by polarized UV exposure on the photopolymers containing a biphenyl (BP), decyl (De), and cholesteryl(chol), chalcone(Chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing the fluorine and chalcone group. The NLC pretilt angle generated is attributed to the biphenyl and alkyl moieties, and the photo-dimerized chalcone group of the photopolymer.

AB - We synthesized the various new photo-crosslinkable polyimide based polymers and generation of pretilt angle for a nematic liquid crystal (NLC) using a photodimerization method on the photopolymers was studied. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450°C. The NLC pretilt angle generated was about 2.5°-3.0° by polarized UV exposure on the photopolymers containing a biphenyl (BP), decyl (De), and cholesteryl(chol), chalcone(Chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing the fluorine and chalcone group. The NLC pretilt angle generated is attributed to the biphenyl and alkyl moieties, and the photo-dimerized chalcone group of the photopolymer.

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