[12a-PB3-1~19] 12.1 Fabrications and Structure Controls

[12a-PB3-2] Flexoelectricity and Pyroelectricity in Side-Chain Type Liquid Crystalline Elastomers Composed of Cholesterol-Derived Mesogens

〇Kazuyuki Hiraoka¹, Hiroyuki Minami¹, Toshio Ishihara¹, Shiori Taira¹, Yuka Hoshino¹, Kota Tajima¹, Yuta Otani¹, Taishi Simii¹, Masato Oshima¹ (1.Tokyo Polytech. Univ.)

Keywords:liquid crystalline elastomers, flexoelectricity, splay distortion

Pyroelectricity and flexoelectricity in liquid crystalline elastomers composed of cholesterol-derived mesogens prepared in cross-linking under horseshoe-like deformation were investigated. X-ray diffractometry revealed that the orientational order partially remained about S = 0.15 ~ 0.2 even in the temperature region of the isotropic phase, and also that bend and/or splay distortion occurred along the depth direction in the elastomers. The emergence of polarization was confirmed above the SmA^* to pseudo-isotropic phase transition temperature whereas no polarization emerged in the SmA^* phase. We tentatively conclude that macroscopic polarization due to the flexoelectric effect emerged and fixed in the elastomers within cross-linked bend and/or splay distortion.