Seo, J. Kim, B. Kim, M.-S. Seo, J.-H. 2024-01-19T13:30:32Z 2024-01-19T13:30:32Z 2022-01-10 2021-11-16 2161-1653 https://pubs.kist.re.kr/handle/201004/116121 While piezoelectric materials are applied in various fields, they generally exhibit poor mechanical toughness. To increase the applicability of these, their mechanical properties need to be improved. In this study, a tough piezoelectric polyrotaxane (PRX) elastomer was developed by blending PRX samples of two different lengths, formed using 10K and 35K poly(ethylene glycol), to align dipole moments for optimization of the piezoelectricity characteristics. The effects of the blending ratio on the crystalline structure of the obtained PRX elastomer were investigated by X-ray diffraction analysis and transmission electron microscopy. In addition, the ferroelectric and piezoelectric properties of the PRX elastomer were evaluated based on its polarization hysteresis loop and voltage generation characteristics, respectively. The PRX elastomer formed by using a ratio of 3:1 (ePR10k7535k25) exhibited a long-range-ordered anisotropic crystalline structure, resulting in a large polarization (Pr) value. As a result, ePR10k7535k25 showed greatly enhanced piezosensitivity against the mechanical vibrations generated by respiratory signals. ？ 2021 American Chemical Society. English American Chemical Society Optimization of Anisotropic Crystalline Structure of Molecular Necklace-like Polyrotaxane for Tough Piezoelectric Elastomer Article 10.1021/acsmacrolett.1c00567 1 ACS Macro Letters, v.10, no.11, pp.1371 - 1376 ACS Macro Letters 10 11 1371 1376 N scie scopus 000721133700007 2-s2.0-85118655121 Polymer Science Polymer Science Article Piezoelectrics Elastomers Crystal structure Macro molecules Molecular structure