composite

Thermoplastic biodegradable composites based on polyhydroxyalkanoates (PHA) and hydroxyapatite (HA) were obtained by extrusion compounding. It was established that HA influences the crystallinity of PHA, as well as the mechanical and sorption properties of the composites, through its nucleation effect. The key factors determining the ability of PHA to form homogeneous, mechanically stable, and water-resistant composites were identified.

The article investigates the moisture absorption of wood-polymer composite (WPC) and the development of fungal cultures during its operation.

Porous osteoplastic composites using polyhydroxybutyrate as a binder and hydroxyapatite (HA) as a reinforcing component were obtained by press molding. To evaluate the effect of HA particles on the structure and properties of the composites, the amount of filler was varied from 0 to 50 wt%. %. It was found that the addition of HA to the polymer matrix causes a decrease in the mechanical strength of the resulting composites due to the formation of discontinuities in the matrix caused by poor interaction between the matrix and filler particles.

The object of the study was composite materials using fly ash from Burshtyn and Kurakhiv TPPs as fillers and polymer dispersions Policril 590 and Latex 2012 as matrices. The relationship between the composition of the types of fly ash from Ukrainian thermal power plants and the peculiarities of the energy state of the dispersed filler particles surface as a factor of interaction with the binder in forming the polymer composite structure was determined.

Developing a new generation of transparent hydrogel firefighting mineral-polymeric materials is an urgent task. These composites are used to produce refractory glass structures, particularly double-glazed windows. These double-glazed windows are multilayer structures made of silicate glass sheets, with gaps filled by a transparent material that turns opaque under flame exposure, reducing heat load and maintaining structural integrity for a specified duration.

The physical and mechanical properties of epoxy composites filled with copper-plated polyamide granules were investigated. Physico-mechanical properties were evaluated based on the results of tensile and impact toughness studies. It is shown that the obtained composites have high strength properties, which are preserved at the level of the unfilled matrix. It was established that the presence of polyamide granules of a copper shell on the surface has little effect on the change in the physical and mechanical properties of epoxy composites.

Описано спосіб розрахунку теплофізичних характеристик композитних матеріалів зі складною внутрішньою структурою на основі дискретної моделі, що будується за методом теплоелектричних аналогій.

This paper consider the method of calculation the thermophysical characteristics of composite materials with complex internal structure based on the discrete model that is constructed by the method of thermal-electric analogies.

In this study, we reported the spontaneous polymerization of two composite materials based on P4VP and mica at two different ratios, 4VP/mica/R=5 and 4VP/mica/R=10, noted as P4VP5@mica and P4VP10@mica, respectively. The obtained composites were characterized using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The polymerized P4VP on the inorganic surface has potential interest for the modification of the interfacial properties of the mica.

In the present study, a novel functionalized silica composite was prepared by adsorption of poly[8- oxyquinoline methacrylate] on the surface of silica gel. Immobilization of poly[8- oxyquinoline methacrylate] on the silica gel surface was confirmed using IR spectroscopy and thermogravimetric analysis combined with mass spectrometry. Scanning electron microscopy revealed that the polymer almost completely covers the surface of the silica gel in the form of agglomerates of different geometric shapes.