Nanoparticles of barium hexaferrite have been synthesized by hydrothermal method. Copper and cobalt ferrite nanoparticles have been prepared via a novel coprecipitation technique. The particles were characterized by scanning electron microscopy, transmission electron microscopy, dynamic light scattering, magnetic granulometry, wide angle x-ray diffraction, small angle x-ray scattering, small angle neutron scattering. For preparation of the ferrofluids, relatively large nanoplates have been stabilized by a double layer. A stabilization method has been developed and the stable ferrofluids with large particles have been obtained. Magneto-optical effects in the ferrofluids containing both spherical and anisometric ferrite nanoparticles have been studied. The ferrofluids with relatively large nanoplates—61 and 51 nm—have been found to be efficient magneto-optical media. Magneto-optical response in these media has been shown to be one or two orders of magnitude higher, than the one in the colloids with particle size about 10 nm. Characteristic frequencies and aggregate sizes have been determined using experimental data.

With the rapid development of wireless communication technologies and the miniaturization trend in the electronics industry, the reduction of electromagnetic interference has become an important issue. To solve this problem, a lot of attention has been focused on polymer composites with combined functional fillers. In this paper, we report a method for creating an acrylonitrile butadiene styrene (ABS) plastic composite with a low amount of conductive carbon and magnetic fillers preparation. Also, we investigate the mechanical, thermophysical, and electrodynamic characteristics of the resulting composites. Increasing the combined filler amount in the ABS composite from 1 to 5 wt % leads to a composite conductivity growth of almost 50 times. It is necessary to underline the temperature decrease of 5 wt % mass loss and, accordingly, the composite heat resistance reduction with an increase in the combined filler from 1 to 5 wt %, while the thermal conductivity remains almost constant. It was established that electrodynamic and physical–mechanical characteristics depend on the agglomeration of fillers. This work is expected to reveal the potential of combining commercially available fillers to construct effective materials with good electromagnetic interference (EMI) protection using mass production methods (extrusion and injection molding).

The effect of γ-irradiation on a polymer composite material based on low-molecular-weight polydiene-epoxy-ether-urethane and divinyl synthetic rubbers is investigated. Irradiation doses of 5 and 10 Mrad are shown to have almost no effect on the material, as evidenced by the characteristic spectral bands in the infrared region. Based on experimental data, a significant change is observed at an irradiation dose of 15 Mrad that induces a partial disruption of the −CH₂−CH₂− bonds and an increase in the number of N–H, –C=, C–, and C–O–C bonds. The irradiation dose of 15 Mrad is assumed to cause a partial disruption of some bonds and the formation of others, which affects the mechanical properties of this polymer composite material.

Hydrothermal synthesis was used to obtain lamellar magnetic particles of barium hexaferrite, and colloidal solutions were prepared on their basis. Magneto-optical effects in colloid solutions of...

Синтезированы самоармирующиеся полиуретаны на основе синтетического дивинилового каучука одностадийным и двухстадийным (форполимерным) способами. Методом сканирующей электронной микроскопии изучены некоторые закономерности образования твердой фазы (псевдонаполнителя). Определены предел прочности при разрыве, модуль и относительное удлинение. Установлено, что механические свойства и размер частиц псевдонаполнителя зависят как от содержания низкомолекулярного спирта, так и от метода синтеза. Обработка экспериментальных данных симплекс-методом позволила выявить область оптимального состава.