Accession Number : ADA307922

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

Descriptive Note : Technical rept.,

Corporate Author : RUTGERS - THE STATE UNIV PISCATAWAY NJ COLL OF ENGINEERING

Personal Author(s) : Winsor, D. L. ; Scheinbeim, J. I. ; Newman, B. A.

PDF Url : ADA307922

Report Date : APR 1996

Pagination or Media Count : 38

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.

Descriptors :   *MECHANICAL PROPERTIES, *FLUORIDES, *FERROELECTRIC MATERIALS, *POLYVINYLIDENES, *PLASTICIZERS, POLARIZATION, STABILITY, DYNAMICS, POLYMERS, HIGH TEMPERATURE, X RAY DIFFRACTION, FILMS, AMORPHOUS MATERIALS, COEFFICIENTS, THERMAL EXPANSION, PIEZOELECTRICITY, DOPING, PYROELECTRICITY, FLUOROPOLYMERS, DIFFRACTION ANALYSIS, AXIAL LOADS, VINYL PLASTICS.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE