TY - JOUR
T1 - Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers
AU - Hwang, Jeoung Yeon
AU - Seo, Dae Shik
AU - Son, Jong Ho
AU - Suh, Dong Hack
PY - 2001/7/15
Y1 - 2001/7/15
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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U2 - 10.1143/jjap.40.l761
DO - 10.1143/jjap.40.l761
M3 - Article
AN - SCOPUS:0035878250
VL - 40
SP - L761-L764
JO - Japanese Journal of Applied Physics, Part 2: Letters
JF - Japanese Journal of Applied Physics, Part 2: Letters
SN - 0021-4922
IS - 7 B
ER -