Abstract
Oriented poly(vinylidene fluoride) (PVDF) films prepared by hot-drawing and poling treatments were examined by three-dimensional Fourier transform infrared spectroscopy. This technique clearly shows that the dipoles distribution of samples were oriented in the drawing direction and then in the electric-field direction after poling. By this technique, the β phase fractions of the PVDF film contributed by the drawing and the poling processes in three principal axis directions can be individually calculated and then the total β phase fraction can be obtained. The sample film after drawing and poling has a highly oriented β phase, and a large electro-optic coefficient r 33 of 0.27 pm V −1 was measured.
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