CHEMICAL PROBLEMS

CORROSION-ELECTROCHEMICAL BEHAVIOR OF POWDER STEEL 09G2S IN SULFURIC SOLUTIONS

Oct 24, 2025 •

Abstract By the method of polarization measurements there have been investigated the corrosion- electrochemical properties of steel 09G2S which was obtained by means of the powder metallurgy. Similar measurements were carried out for compact steel in order to compare the obtained data. Anodic and cathodic curves taken in the sea water showed that corrosion-electrochemical properties […]

TECHNOLOGICAL FEATURES OF INJECTION MOULDING OF DYNAMICALLY VULCANIZED NANOCOMPOSITES BASED ON RANDOM POLYPROPYLENE, NITRIL BUTADIENE RUBBER AND BENTONITE

Oct 24, 2025 •

Abstract The work deals with the influence of the technological parameters of injection molding on the basic physicomechanical characteristics of nanocomposites of dynamically vulcanized thermoplastic elastomers based on random polypropylene and nitrile butadiene rubber of various grades. The equipment used was a single-screw molding unit with 4 temperature zones of the material cylinder. Rotational and […]

SYNTHESIS AND X-RAY DIFFRACTION STUDY OF Pb4Yb2S7 COMPOUND

Oct 24, 2025 •

Abstract Crystallographic characteristics of ternary lanthanide sulfide compounds of lead were collected and their crystallochemical analysis was performed. New compounds were synthesized in PbS- Yb2S3 (2:1, 3:1, 4:1) systems. In the ratio PbS-Yb2S3 (4:1) there was detected the formation of a new compound Pb4Yb2S7. X-ray diffraction studies revealed that this compound was crystallized in the […]

PHYSICOMECHANICAL PROPERTIES OF HIGH AND LOW DENSITY POLYETHYLENE MIXTURES AND MODIFIED COMPOSITIONS ON THEIR BASIS

Oct 24, 2025 •

Abstract . The paper considers the influence of the ratio of polymer components – high density polyethylene and low density polyethylene, on the main physicomechanical properties. The properties of polymer mixtures such as tensile yield stress, ultimate tensile stress and elongation at break were studied. It revealed that as the content of low density polyethylene […]