Ferroelectric and Piezoelectric Properties of Odd-Numbered Nylons.

摘要

Recent discoveries in our laboratory of a new class of ferroelectric polymers--the odd-numbered nylons--led to another important discovery: a mechanism for the stabilization of the remanent polarization in these materials to their crystalline melting point. As the piezoelectric response of ferroelectric polymers is as stable as their remanent polarization, we have produced a set of high temperature stable piezoelectric polymers which can easily operate in a temperature range up to approximately 250 deg C. in addition, vie have now begun to examine new types of piezoelectric polymer films consisting of co-electroprocessed layers of odd-numbered nylon film and poly(vinylidene fluoride) PVF film, which are shown -o exhibit a significantly enhanced response, compared to that of either component. Enhanced response is also observed for blended powders of PVF 2 and a copolymer of vinylidene fluoride and tri-fluoroethylene.