Synthesis and characterization of novel polyimides bearing a side chain composed of stilbene mesogen and undecyl spacer and the alignment ability of nematic liquid-crystal molecules
SCIE
SCOPUS
- Title
- Synthesis and characterization of novel polyimides bearing a side chain composed of stilbene mesogen and undecyl spacer and the alignment ability of nematic liquid-crystal molecules
- Authors
- Park, JH; Sohn, BH; Jung, JC; Lee, SW; Ree, M
- Date Issued
- 2001-05-15
- Publisher
- JOHN WILEY & SONS INC
- Abstract
- Four different polyimides with side chains containing undecyl spacers and 4-fluorostilbene mesogen end groups were prepared, and their structures and the controllability of the liquid-crystal (LC) alignment with rubbing were investigated. From X-ray scattering and differential scanning calorimetry data, pyromellitic dianhydride (PMDA)-, benzophenone-3,3 ' ,4,4 ' -tetracarboxylic dianhydride (BTDA)-, and 4,4 ' -oxydi(phthalic anhydride) (ODPA)-based polyimides were shown to have layered structures and short-range ordering. Pretilt angles of LCs on the rubbed surfaces were 1-9 degrees, depending on the rubbing density and backbone. In particular, the long undecyl spacers caused the mesogenic stilbene end groups to lie next to the main chain, resulting in a reduction in the pretilt angles. (C) 2001 John Wiley & Sons, Inc.
- Keywords
- polyimide; stilbene; rubbing; undecyl spacer; pretilt angle; RUBBED POLYIMIDE; POLYMER SURFACES; PRETILT ANGLES; THIN-FILMS; ORIENTATION; LAYER; STRENGTH; DISPLAYS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19583
- DOI
- 10.1002/pola.1157
- ISSN
- 0887-624X
- Article Type
- Article
- Citation
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol. 39, no. 10, page. 1800 - 1809, 2001-05-15
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- There are no files associated with this item.
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