Journal
CHEMPHYSCHEM
Volume 14, Issue 12, Pages 2704-2710Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201300093
Keywords
electro-optical properties; electrorheological effect; liquid crystals; polysiloxane; side-on attachment
Funding
- Japan Society for the Promotion of Science (JSPS)
- Regional Research and Development Resources Utilization Type Program, A-STEP of the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [22107008] Funding Source: KAKEN
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The electrorheological (ER) effect and the electro-optical properties of a side-on liquid crystalline polysiloxane (PS) are investigated. A large ER effect is observed and the response to the shear stress of neat PS in the nematic phase is shown to be affected by the shear rate. PS is also mixed with a low-molar nematic liquid crystal (5CB) in order to improve the response behavior to the applied electric field. The rheological properties of such mixtures are highly dependent on the concentration of 5CB. The composites respond faster to the applied electric field and have improved electro-optical properties. This study offers a new perspective on the development of liquid crystal materials for the ER effect.
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