ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Biaxially oriented films of polyvinylidene fluoride [-(CH2-CF2) n -...; PVDF] of thickness 25 μm, originally containing both the α and β crystal forms, have been corona charged at room temperature to surface potentials of up to 10 kV using positive and negative corona. The behaviour of the optical density of the α-form infra-red band at 796 cm−1, measured in the transmission mode, was found to be inverse to that of the piezoelectric coefficient, g 31, with increasing charging voltage. Attenuated total reflection (ATR) measurements on the same samples indicated that the extent of poling close to the surface which received the corona charge was less than that close to the earthed surface and less than that of the bulk. The results support a mechanism of dipole orientation for the origin of piezoelectricity in PVDF.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00552110
Permalink
