Effects of Plasticizer on the Mechanical and Ferroelectric Properties of Uniaxially Oriented Beta-Phase PVF2.

Abstract

The ferroelectric, piezoelectric, and dynamic mechanical properties of uniaxially oriented films of poly(vinylidene fluoride) PVF2, undoped and doped with a plasticizer, tricresyl phosphate (TCP), were investigated. X-ray diffraction studies were carried out and show that for uniaxially oriented films, as dopant concentration increased, the percentage of non-polar alpha-phase increased. These results also confirmed previous studies which indicate that the dopant resides in the amorphous regions. The piezoelectric coefficients (d31 and e31), pyroelectric coefficient (P sub y), and remanent polarization (P sub r) were observed to be enhanced by doping with TCP. Measurements of the pyroelectric coefficient, P sub y, showed that the dopant produced a large increase in P sub y from 19.6 to 28.5 micro-C/sq m/K, suggesting an increase in the thermal expansion coefficient, alpha sub 3. The data also suggest that a small amount of dopant in the noncrystalline regions greatly enhanced the high-temperature stability of the remanent polarization.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1996
Accession Number
ADA307922

Entities

People

  • B. A. Newman
  • D. L. Winsor
  • J. I. Scheinbeim

Organizations

  • Rutgers School of Engineering

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amorphous Materials
  • Crystal Structure
  • Crystals
  • Current Density
  • Dielectric Permittivity
  • Electric Fields
  • Electromagnetic Fields
  • Glass Transition Temperature
  • High Temperature
  • Measurement
  • Mechanical Properties
  • Phase Transformations
  • Thermal Expansion
  • Transition Temperature
  • Transitions
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

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