Piezoelectric polymers dielectric relaxation strength

It can be concluded that remanent polarization and hence the piezoelectric response of a material are determined by Ae this makes it a practical criterion to use when designing piezoelectric amorphous polymers. The Dielectric relaxation strength Ae may be the result of either free or cooperative dipole motion. Dielectric theory yields a mathematical approach for examining the dielectric relaxation Ae due to free rotation of the dipoles. The equation incorporates Debye s work based on statistical mechanics, the Clausius-Mossotti equation, and the Onsager local field and neglects short-range interactions (43) ... 

Designing an amorphous polymer with a large dielectric relaxation strength and hence piezoelectric response would require the ability to incorporate highly polar groups at high concentrations and cooperative dipole motion. 

Piezo- and pyroelectric coostanls and dielectric relaxation strengths VDCN copolymers are listed in TU>ie 1 [1438]. Piezoelectric constant seems to be dneedy pn>-poitional to residual polarization (F,), and further related to dielectric lelaxathm strength. Generally, piezoelectric constant in polymer electreta is proportional to the remanent polarization as related by following equatioo ... 

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