Abstract

Poly(vinylidene fluoride-trifluoroethylene) (P(VF 2-TrFE)) copolymers with about 30 mol% of TrFE exhibit a ferroelectric transition of first-order type around 100°C. This transition is investigated using complementary measurements of small angle X-ray scattering and wide angle X-ray diffraction. The results provide information on the properties of both the amorphous and crystalline phases as a function of temperature and on the lamellar morphology. They show that temperature cycling through the Curie transition increases the degree of crystallinity of the polymer and modifies the structure.

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