Piezo- and pyro-electricity in polymer electrets

摘要: In 1960 Gubkin1 published an electrostatic theory of piezoelectricity which did not involve the microscopic structure electret. This approach would seem to be a good description phenomenon in polymer materials, many are partially or completely amorphous. We applied Gubkin's model specific set experimental conditions, resulted some simplifications. These conditions are: 1. measure changes surface charge at nearly zero potential. 2. use thin evaporated metal electrodes so that change area accord with specimen area, A. 3. consider only amorphous specimens we assume elastically isotropic. 4. free charges frozen solid and move proportion macroscopic strains, polarization rigid molecular dipoles whose positions strains but effective total moment remains constant as long