ИСТИНА

The applications of fluoropolymers in electronic devices have been interested researchers for many years, especially because of their ferroelectric properties , , , , . Polyvinylidene fluoride (PVDF) has a special position in this type class of polymers, which shows piezoelectricpiezo-, perropyro- and ferroelectric properties, depending on the crystalline phaseiii. For example, to for obtaining a polar crystalline phase β, required for ferroelectric properties, complex film processing methods are used, such as deformation, high-temperature annealing, and quenching techniques. To avoid possible difficulties, as well as to increase possible applications and adjust the properties, copolymers with grafted polar monomers are can be used. In this work we report on novel copolymers based on PVDF and chlorotrifluoroethylene with grafted polyacrylonitrile (PAN) or poly(ethyl methacrylate) (PEMA) chainsvi. Using the controlled radical polymerization, we have obtained synthesized polymers with various degree of PAN or PEMA grafting onto their side chains. The grafted chain content was determined by NMR spectroscopy. The effect of various synthetic parameters on the physical properties of the obtained copolymers obtained is shown. The phase behavior and thermal stability of the obtained samples were investigated by DSC and TGA methods.