modification

The work investigated the influence of the nature of the binder and filler modifier on the rheological properties of epoxy composites based on ED-20 resin. The binder was modified by introducing epoxidized soybean oil and a mixture of polyvinyl butyral with epoxidized soybean oil. Copper polyvinyl chloride, and aluminum oxide, as well as their mixture, were used as fillers. It was found that filling and modification of the matrix change the nature of the flow curves. The resulting composites are characterized by a uniform distribution of the filler. 

A new type of epoxyamine composition containing a copper (II) metalorganic complex has been created. The mechanism for obtaining the complex is developed. The structure and properties of the modified materials have been explored and analyzed, as well the relationship between them has been determined. A copper (II) chelate complex has been obtained and applied as a hardener for epoxyamine compositions.  It has also been found that the complex mentioned reduces the flammability of materials during the structuring. 

The effect of technical lignin on the characteristics of road bitumen obtained by oxidation of petroleum residues (oxidized bitumen) was examined. Two samples of hydrolysis-type technical lignin, obtained as a by-product of the production of feed yeast, were used. The first sample was technical lignin purified by sieving to remove unprocessed plant material. The second sample was technical lignin, purified by sieving to remove unprocessed plant material and flotation enrichment to remove inorganic components.

The sorption of copper ions from a solution of copper(II) sulfate by the native form of natural clinoptilolite under mechanical stirring and under the action of ultrasonic radiation of different power and under different modes of process implementation (continuous and cyclic) was investigated. Based on the obtained results, it was concluded that ultrasonic vibrations significantly intensify the diffusion processes in the studied system.

The process of modification of natural clinoptilolite, pre-enriched by the main component, with manganese ions from nitrate solutions as precursors for obtaining manganese(IV) oxide was studied. The value of the sorption capacity of different fractions of clinoptilolite with respect to manganese ions at room temperature was determined, and the sorption rate and rate constants of this process were calculated. The influence of the concentration of manganese nitrate solution on the sorption capacity of certain fractions of zeolite was determined.

Polylactide composite materials with organic filler-modifier starch, inorganic filler -calcium carbonate and plasticizer - epoxidized soybean oil for 3D printing have been developed. On the basis of the modular deformation method of calculation the elastic-plastic and deformation properties of the developed modified polylactide materials are determined. The change of modulus of deformation, modulus of elasticity, modulus of high elasticity depending on the composition of the composite is revealed.

The possibility of using potassium humate as an inhibitor of the technological aging of oxidized petro-leum bitumen has been investigated. Samples of potas-sium humate obtained from various raw materials, in particular peat and leonardite, were selected and compared. Aging coefficients have been calculated and operational properties of modified bitumen as a binding material for hot mix asphalt have been investigated. It was established that 3.0 wt.

Areas of use of natural clinoptilolite were analyzed. The emphasis was placed on its application in water technology and medical practice. The results of the study of the dehydration of clinoptilolite at different temperatures were presented. The influence of the activation temperature of clinoptilolite on its sorption capacity for silver ions was determined. The effect of modification with ions and highly dispersed silver particles on the sorption capacity of various zeolite fractions with respect to water was investigated.