Accession Number : ADA140770

Title :   The Effect of Plasticizer on the Polarization of Poly(Vinylidene Fluoride) Films.

Descriptive Note : Technical rept.,

Corporate Author : RUTGERS - THE STATE UNIV PISCATAWAY NJ DEPT OF MECHANICS AND MATERIALS SCIENCE

Personal Author(s) : Sen,A ; Scheinbeim,J I ; Newman,B A

PDF Url : ADA140770

Report Date : 12 Apr 1984

Pagination or Media Count : 33

Abstract : Plasticized and unplasticized, unoriented phase II PVF2 films were poled at fields ranging from from 0.5 MV/cm to 1.25 MV/cm at room temperature for 10 minutes. X-ray diffraction data revealed that at fields near 1.0 MV/cm, a change in conformation to produce phase I occurred. The amount of Phase I produced was found to be significantly higher in the case of plasticized film. The plasticized films also showed higher piezoelectric strain coefficient, d sub 31, stress coefficient, e sub 31, and pyroelectric coefficient P sub y, as compared to unplasticized films subjected to identical poling conditions. In a similar study of oriented phase I films (obtained by stretching plasticized and unplasticized phase II films), poling fields ranging from 0.5 MV/cm to 2.0 MV/cm were used. The Bragg angle for the (110), (200) reflection and the half-width for this reflection were found to be higher for the poled plasticized films with 2 theta increasing with increasing plasticizer content. P sub y, e sub 31, and d sub 31 were also higher as compared to the plasticized films.

Descriptors :   *Polyvinylidenes, *Fluoropolymers, *Polymeric films, *Crystal structure, Plasticizers, Polarization, Piezoelectric effect, Pyroelectricity, Strain rate, Coefficients, Stresses, Orientation(Direction), Phase, Elongation, Bragg angle, Reflection, X ray diffraction

Subject Categories : Plastics
      Crystallography
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE