Improved dielectric properties achieved by blending PP and PVDF

• Published in: IET Nanodielectrics Vol. 2; no. 2; pp. 78 - 81
• Main Authors: Fan, Benhui, He, Delong, Liu, Yu, Zhou, Mingyu, Zhang, Chong, Bai, Jinbo
• Format: Journal Article
• Language: English
• Published: Beijing The Institution of Engineering and Technology 01.06.2019; John Wiley & Sons, Inc; Wiley
• Subjects: Addition polymerization; Blending; Carbon black; commercial product PVDF 370; Crystallites; Dielectric loss; dielectric losses; Dielectric properties; dielectric thin films; Engineering Sciences; extrusion; filled polymers; filming system; frequency 1000.0 Hz; frequency 1000.0 Hz; improved dielectric properties; Low density polyethylenes; low dielectric loss; low-density polyethylene; lubricant; Materials; modified dielectric properties; molten state; Permittivity; poly(vinylidene fluoride; Polymer blends; Polymer films; Polymers; Polyvinylidene fluorides; PP/PVDF 370/LDPE; Research Article; ternary blends; Vinylidene fluoride; low-density polyethylene; poly(vinylidene fluoride; filming system; permittivity; C; polymer blends; polymer films; carbon black; PP/PVDF 370/LDPE; improved dielectric properties; commercial product PVDF 370; molten state; dielectric thin films; filled polymers; extrusion; low dielectric loss; ternary blends; dielectric losses; blending; modified dielectric properties; crystallites; lubricant; frequency 1000.0 Hz
• ISSN: 2514-3255; 2514-3255
• DOI: 10.1049/iet-nde.2018.0038

Polymer films composed of polypropylene (PP) and poly(vinylidene fluoride) (PVDF) have been fabricated by extrusion with filming system. Owing to the low content of crystallites and the lubricant of carbon black, the commercial product PVDF 370 can be compatible with PP by simply blending at the molten state and the obtained film has improved dielectric constant (ɛ′ = 4.5) and reduced dielectric loss (tan δ = 0.5%) at 1000 Hz. The modified dielectric properties result from the high dielectric constant of PVDF and low dielectric loss of PP. In addition, by introducing the third polymer, low-density polyethylene (LDPE), the dielectric constant of the ternary blends (PP/PVDF 370/LDPE) can further be increased.