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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)L761-L764
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume40
Issue number7 B
DOIs
Publication statusPublished - 2001 Jul 15

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Generation of pretilt angle for nematic liquid crystal using the photodimerization method on various new photo-crosslinkable polyimide based polymers'. Together they form a unique fingerprint.

Cite this