FERROELECTRIC FILM AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a nanodispersed PVDF/PA11 blend type ferroelectric film excellent in ferroelectricity, heat resistance, mechanical properties, and adhesiveness and to provide a simple method for producing the same.

SOLUTION: The ferroelectric film is made from a product prepared by applying an AC electric field to a filmlike extrudate of a nanodispersed polymer blend which is a filmlike extrudate of a polymer blend of 95 to 20 mass% polyvinylidene fluoride (PVDF) and 5 to 80 mass% polyamide 11 (PA11) and in which the polyamide 11 dispersed phase on the order of ten nanometers are uniformly dispersed in the polyvinylidene fluoride matrix phase. This is obtained by melt-mixing and extruding a polymer blend of PVDF and PA11 in a specified ratio at a revolution speed as high as 500 rpm or higher to form a filmlike product and rolling the filmlike product to form a film, and applying an AC electric field to the film to effect its poling.

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