Effect of Water Content on the Piezoelectric Properties of Nylon 11 and Nylon 7
Abstract
Studies of the piezoelectric properties of odd numbered nylons such as nylon 11 and nylon 7 are important, not only in their own right, but because they provide a way to examine the generality of concepts put forward to explain the piezoelectric and pyroelectric properties of poly(vinylidene fluoride) films. Over the past several years, A series of studies of nylon 11 and nylon 7 have been carried out. In a recent study appropriate sample preparation and poling techniques were described, which gave rise to mechanically unoriented but polarized films of nylon 11 with values of the piezoelectric strain coefficient, d31, as high as 7.1 pc/N. It is now understood that bulk polarization in poly(vinylidene fluoride) results from oriented dipoles in the crystalline regions, which may be caused by a ferroelectric switching process, phase transformations occurring during the poling process, or as a result of biased crystallization under high electric fields. The results of some of the studies on nylon 11 and nylon 7 are not easily understood using these concepts.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA202117
Entities
People
- B. A. Newman
- J. I. Scheinbeim
- K. G. Kim
Organizations
- Rutgers University–New Brunswick