Accession Number : ADA132741

Title :   Rigorous Bounds for the Calculated Dielectric Constants of Ferroelectric Polymers.

Descriptive Note : Technical rept.,

Corporate Author : NATIONAL BUREAU OF STANDARDS WASHINGTON DC POLYMER SCIENCE AND STANDARDS DIV

Personal Author(s) : Broadhurst,Martin G

PDF Url : ADA132741

Report Date : Aug 1983

Pagination or Media Count : 14

Abstract : A theory is presented for calculating rigorous upper and lower bounds for the dielectric constant of a semicrystalline polymer in terms of the volume fraction of crystalline phase, the dielectric constant of the liquid phase and the anisotropic dielectric tensor of the crystalline phase. Also required are two orientation functions (cos to the 2nd power theta) and (cos to the 2nd power alpha) where theta defines the tilt of crystal lamellae and alpha the orientation of the electric moment of each crystal with respect to the measuring field. Bounds are presented for polyvinylidene fluoride for a variety of orientations.

Descriptors :   *Polymers, *Ferroelectric materials, *Dielectrics, Polyvinylidenes, Fluorides, Anisotropy, Tensors, Constants, Electric moments, Crystals, Orientation(Direction)

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE