The conversion from the normal ferroelectric polymer to a ferroelectric relaxor is also reflected by molecular conformation changes in the polymer. In ferroelectric copolymers, a majority of the crystallite chains (∼75%
for 68/32 composition) are in the polar all trans con-formation, leading to a high effective dipole moment. In contrast, the majority of the P(VDF-TrFE-CFE) terpoly-mer crystallite chains adopt non-polar conformations, as a result of the defects introduced by the bulky CFE ter-monomer units. The different chain conformations asso-ciated with the crystalline phases can be distinguished by their characteristic bands in FTIR spectra, which are pre-sented in Fig. 3. The bands at 1290 cm−1 and 850 cm−1