Ferroelectric Properties in Polyamides of m-Xylylenediamine and Dicarboxylic Acids

Abstract

The relationship between electric displacement D and electric field E was studied for polyamides consisting of m -xylylenediamine and aliphatic dicarboxylic acids with numbers of carbon atoms from 6 to 11 and 13. Regardless of the number of carbon atoms in the acids, quenched samples of these polyamides exhibit a D-E hysteresis loop with remanent polarization of 23-67 mC·m -2 . Polarization is related to the amide groups aligned by the electric field.