ИСТИНА

Recently, a series of copolymers based on polyvinylidene fluoride with grafted polyethyl methacrylate (PEMA) chains were obtained by photoinduced reversible-deactivation radical polymerization (RDRP), and the effect of PEMA chains on their properties was investigated . In particular, the study of thermal properties showed that an increase in the content of grafted chains in the copolymers leads to a decrease in the degree of crystallinity and improves film-forming properties, while it is accompanied by a decrease in the polymer degradation temperature. The grafted polymers obtained have good film-forming properties, therefore, studies were conducted and patterns were identified for the films of binary and ternary copolymers with different contents of grafted polyethyl methacrylate chains. The possibility of using copolymers with PEMA as capacitive pressure sensors, for which the sensitivity and operating range varies with the change in the content of grafted PEMA chains, was investigated. Binary copolymers turned out to be more promising material for the pressure sensors, since they show high response reproducibility and low hysteresis. In addition, the copolymer films were filled with different amounts of barium titanate nanoparticles in order to track the change in permittivity and dielectric losses as compared to initial non-grafted polymers. The best result was shown by filled films based on the grafted copolymers with a small amount of PEMA chains compared to the initial non-grafted polymers.