| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 가을 (10/10 ~ 10/11, 부경대학교) |
| 권호 |
28권 2호, p.196 |
| 발표분야 |
특별 심포지엄 |
| 제목 |
Effect of Polyol Chain Length on Actuation of Polyurethane/MMT nanocomposite |
| 초록 |
Electrostriction is the phenomenon that a material is strained due to both Maxwell stress effect and electrostriction effect developed by the applied voltage. When a dielectric material is subject to an electric field, it will experience Maxwell stress caused by the Coulomb force between accumulated charges and electrostriction caused by the reorientation of polar phase in the material. In many electrostrictive materials, especially polymeric elastomers can produce large deformation and force due to their low elastic modulus. PU/MMT (montmorillonite) nanocomposites showed superior elongation and storage modulus to pure PU in several studies. We prepared PU/MMT nanocomposites with different polyol chain length and clay contents to investigate the actuation properties of PU/MMT nanocomposites. From X-ray diffraction (XRD) results of PU/MMT nanocomposites, it could be known that silicate layers were completely exfoliated in the polyurethane matrix. We also used compliant PU carbon black electrode for the measurement of displacement in the electric field. PU/MMT nanocomposites showed superior displacement to pure PU. And PU with polyol of Mw 2000 had large displacement than PU with polyol of Mw 1000. |
| 저자 |
김범호, 최화정, 박경미, 박한수, 정영대, 정해도, 조남주
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| 소속 |
부산대 |
| 키워드 |
actuator; polyurethane; nanocomposite
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| E-Mail |
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