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.
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.
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.
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.
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 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.
The ability of polymers and composites on their basis to be processed in the viscous fluid state, the choice of rational methods and technological parameters of the processes of processing are largely determined by their technological properties.
The paper describes some approaches for thermal analysis of nano-composites by finite element method.
In this paper for calculation of reinforced concrete columns strengthened with carbon laminate with suggestions based on the method of calculation according to the recommendations NIISK and Sika on the basis of deformation model calculation according to regulations . To determine the additional eccentricity introduced by bending flexibility factor, which is derived using in Eurocode 2. The algorithm for calculating strengthened at the primary level loading columns.
The essential effect of the nature and the content of the fine-grained modified polyvinylpyrrolidone magnesium hydrosilicate on the degree of crystallinity and crystallite sizes of polypropylene was established. This effect is caused by the change in the structural formations at the phases interface and by the nature of intermolecular interactions. Fine-grained particles of the modified magnesium hydrosilicate act as the additional centers of crystallization within the polymer composite material.