Dielectric, piezoelectric and ferroelectric properties of a poly (vinylidene fluoride-co-trifluoroethylene) synthesized via a hydrogenation process

• Published in: Polymer (Guilford) 2013-01, Vol.54 (1), p.440-446
• Main Authors: Xia, Weimin, Xu, Zhuo, Zhang, Zhicheng, Li, Huayi
• Format: Article
• Language: English
• Subjects: Applied sciences; crystal structure; Electrical properties; Electrical, magnetic and optical properties; Exact sciences and technology; Hydrogenation; Organic polymers; P(VDF-co-TrFE); Physicochemistry of polymers; polymers; Properties and characterization
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2012.11.027

The dielectric, piezoelectric and ferroelectric properties of a poly (vinylidene fluoride-co-trifluoroethylene) (P (VDF-co-TrFE)) copolymer synthesized via a novel hydrogenation process are presented in this work. Comparing with the direct copolymerized P(VDF-co-TrFE), the head-to-head (H–H) connection of vinylidene fluoride (VDF) and trifluoroethylene (TrFE) units in hydrogenized P(VDF-co-TrFE) results in the increasing crystal domains and the improvement of overall crystallinity and. Therefore, excellent electric properties, including dielectric constant of 11 at a frequency of 100 Hz, a piezoelectric value (d33) of −23 pC/N, a remnant polarization (Pr) of 7 μC/cm2 and a maximum polarization (Ps) of 10 μC/cm2 were observed in hydrogenized P(VDF-co-TrFE), which are rather close to that obtained in copolymerized copolymer. The results indicate that the improved condensed structures offer the low cost and convenient hydrogenized P(VDF-co-TrFE) broader application scenery in piezoelectric devices than the direct copolymer. [Display omitted]