期刊
LIQUID CRYSTALS
卷 34, 期 2, 页码 229-234出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290600858108
关键词
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A side- chain liquid crystalline polysiloxane derivative possessing mesogens was synthesized. The mesogens included a large dielectrically- anisotropic moiety. Phase transition behaviour was investigated and the electrorheological ( ER) effect of the polymer considered. No ER effect was observed in non- sheared polysiloxane derivative because of its high inherent viscosity. However, a large ER effect was observed after pre- shearing. Pre- shearing, i. e. shearing with a high shear rate before the measurements, arranges the terminal mesogens in the shearing direction. Furthermore, a dilution of the sample led to a larger ER effect exceeding 10 000 Pa. We thus were able to demonstrate a new approach for the appearance of the ER effect.
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