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Розроблення дискретної моделі знаходження ефективних теплофізичних характеристик композитних матеріалів

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.

Spontaneous Polymerization of 4-Vinylpyridine Monomer on Micron-Sized Mica Platelets

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.

Synthesis, Sorption Properties, and Evaluation of Silica Gel with Adsorbed Poly[8-Oxyquinoline Methacrylate] as a Sorbent for Cu(II), Cd(II), Pb(II) and Fe(III) Ions

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.

THE EFFECT OF CALCIUM CARBONATE ON THE PERFORMANCE CHARACTERISTICS OF POLYLACTIDE COMPOSITES

Polylactide composite materials with inorganic filler -calcium carbonate which have been modified with epoxidized soybean oil and glycerin have been developed. On the basis of the modular-deformation method of calculation the elastic-plastic properties of the developed polylactide materials and the coefficient of structure are determined. The change of the modulus of deformation, modulus of elasticity, surface hardness, Vicat softening point and thermomechanical characteristics of polylactide composites is revealed.

Influence of diamond component based on wurtzite boron nitride on wear resistance of cutting tool

The article is devoted to the study of the influence of the diamond component in a composite superhard material based on wurtzite boron nitride on the stability of the tool during turning of hardened steels in the mode of smooth turning and when processing intermittent surfaces. The aim of the work is to study the influence of the content of the diamond component in the composite superhard material based on wurtzite boron nitride on the stability of the tool.

Modified polyvinyl chloride composites with metal-containing polymer-silicate fillers

The influence of the nature of the metal-containing polymer-silicate fillers on morphology, surface hardness, Vicat softening point and elastic-plastic properties of PVC plasticates has been researched. The influence of polymer-silicate fillers on physic-mechanical and thermal properties and the conditions directional regulation of technological and operational properties of modified composites has been established.  

Influence of Polymer-Silicate Nucleator on the Structure and Properties of Polyamide 6

Physico-chemical properties of developed nickel-containing modified silicate materials as the nucleators for composites based on polyamide 6 are presented. As it was established, additive of the nucleator modified by polyvinylpyrrolidone promotes the increase of crystallinity degree of polyamide 6 and the decrease of crystallite size. It was found that changes in the structure of the material cause the increase of its tensile strength, surface hardness and Vicat softening point.

PECULIARITIES OF METALIZATION OF PULLED POLYETHYLENE

The results of experimental studies of the peculiarities of metallization of granular polyethylene are presented. The influence of concentration factors on the metallization process of zinc-activated polyethylene granules of brand Liten PL-10 was investigated. It is established that by changing the concentration of copper sulfate and sodium hydroxide, as well as the degree of loading of polymeric raw materials, it is possible to effectively regulate the amount of recovered copper on granules of polyethylene, and therefore the thickness of the metal layer formed on them.

Influence of metal-containing polymer-silicate filler on the technological properties of polypropylene

The influence of Ni-containing polymer-silicate filler on the technological properties of polypropylene is presented. It was found that the introduction of silicate fillers modified by polyvinyl alcohol change the flow patterns of polypropylene melts, in particular viscosity increases and anomalous viscosity shifts. The change of thermomechanical curves of polypropylene under the action of modified silicate fillers is shown.

Viscoelastic Properties of Amine-Cured Epoxy-Titania Composites Obtained by the Sol-Gel Method

Viscoelastic properties of amine-cured epoxytitania composites were investigated. The composites were synthesized by the sol-gel method and analysis of their physico-mechanical properties indicated that higher TiO2 content causes the decrease in glass transition temperature of the composites. Non-linear change of crosslink density with a filler content was observed.