화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2014년 봄 (04/10 ~ 04/11, 대전 컨벤션센터)
권호 39권 1호
발표분야 고분자구조 및 물성
제목 Enhancement in dielectric properties of Poly(Vinylidene Difluoride) Nanocomposite
초록 Poly(vinylidene difluoride) (PVDF) and its copolymers have several crystal structures, especially β-structured crystal has all-trans conformation with aligned dipoles that is directly related to the pyro-, piezoelectric properties of PVDF. Owing to the superior electric properties of β-formed PVDF, so many researches have been proceeded to enhance the portion of β-crystal in a matrix. There are two ways basically for letting β-phase be major in a matrix. One is mechanical stretching. Among the crystal structures, β-phase has most elongated unit length because of its all-trans conformation. With sufficient thermal energy enough to change the conformational structure, external tension makes the phase be transformed into β-phase. The other one is electric poling. Strong electric field permitted on PVDF sample induces the dipole alignment, leads to all-trans conformation.
저자 임준영, 서용석
소속 서울대
키워드 PVDF; Polyvinylidene difluoride
E-Mail ysseo@snu.ac.kr