Abstract
Novel liquid crystals (LCs) photoalignment system, which exhibits outstanding photosensitivity and excellent thermal stability, has been developed based on new soluble polyimide. Homogeneous alignment of liquid crystals (LCs) was induced by soluble polyimide (CMPI) having chloromethyl side groups upon irradiation of linearty polarized UV light (LPUVL) with short irradiation time. The photoaligned film was thermally stable without destroying LC alignment when LC cell was stored at 85°C for 14 days. The pretill angle of LC decreased with irradiation time, which is contributed by the increased polar surface energy of CMPI film after irradiation of LPUVL. FT-IR spectra confirmed that the photosensitivity of polyimide was improved greatly by introducing chloromethyl group and the alignment of LC was contribute by the photo-decomposition of polyimide main chain upon irradiation.
| Original language | English |
|---|---|
| Pages (from-to) | 145-152 |
| Number of pages | 8 |
| Journal | Molecular Crystals and Liquid Crystals |
| Volume | 425 |
| DOIs | |
| State | Published - 2004 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Chloromethyl polyimide
- Photoalignment
- Photosensitivity
- Thermal stability
Quacquarelli Symonds(QS) Subject Topics
- Materials Science
- Chemistry
- Physics & Astronomy
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