Accession Number : ADA188310

Title :   Statistical-Mechanical Study of Polyvinylidene Fluoride.

Descriptive Note : Final rept. Oct 83-Sep 87,

Corporate Author : CASE-WESTERN RESERVE UNIV CLEVELAND OH

Personal Author(s) : Taylor, Philip L

PDF Url : ADA188310

Report Date : 01 Nov 1987

Pagination or Media Count : 7

Abstract : A theoretical study of polyvinylidene fluoride has been performed in which calculations have been made of the equation of state, of the piezoelectric and pyroelectric coefficients, and of the mechanism of poling of beta phase material. Transfer integral and mean-field methods have been used to derive the free energies of the various phases, and thence to derive the thermodynamic variables as functions of temperature, stress, and applied electric field. The effect of lattice distortions on the piezoelectric coefficients has been studied, with particular attention paid to the nonlinear coefficients and their origin. Other work includes study of polyvinylidene fluoride as a detector of energetic heavy nuclei and investigation of the properties of random copolymers. Keywords: Piezoelectric, Pyroelectric, Polymer, Ferroelectric, Polyvinylidene fluoride.

Descriptors :   *FERROELECTRIC MATERIALS, *FLUORIDES, *PIEZOELECTRICITY, *POLYVINYLIDENES, *PYROELECTRICITY, COEFFICIENTS, COPOLYMERS, ELECTRIC FIELDS, ENERGETIC PROPERTIES, ENERGY, EQUATIONS OF STATE, MATERIALS, NONLINEAR SYSTEMS, NUCLEI, THERMODYNAMICS, TRANSFER, VARIABLES

Subject Categories : Polymer Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE