MICROSTRUCTURE AND FERROELECTRIC PROPERTY OF VDF-BASED ELECTROACTIVE POLYMERS
Ferroelectrics are technologically important smart materials which can be applied in capacitors, transducers, actuators, sensors, nonvolatile memories, and electrooptic modulators. For over 30 years, vinylidene fluoride based polymers have drawn considerable attention for their excellent ferroelectric properties1. The interesting electric properties of vinylidene fluoride homopolymer (PVDF) originate from the molecular conformation and the chain packing in the unit cell (shown in Figure 1). PVDF crystals with all-trans (Tm>4) planar zigzag conformation and parallel electric dipole moments are ferroelectrics and exhibit a spontaneous electric polarization that can be switched from one direction to another by the external electric field. The crystals formed by a statistical combination of TG, TG, TTTG, and TTTG molecular conformations are paraelectric, which have counteractive dipole moments in the crystals.
Huimin Bao Chengliang Jia Qundong Shen
Department of Polymer Science & Engineering,School of Chemistry & Chemical Engineering,Nanjing University,Nanjing 210093,China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
319-320
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）