Browsing by Author "KULISH, IRINA"

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    EVALUATION OF THE COMPATIBILITY OF POLYORGANYLSILOXANES AND HIGH-MOLECULAR POLYMERS USED AS EMULSIFIERS IN FINISHING WORKS
    (Technical University of Liberec, ) HOROKHOV, IHOR; KULISH, IRINA; ASAULYUK, TATYANA; SARIBYEKOVA, YULIA; SEMESHKO, OLGA; MYASNYKOV, SERGEY; Technická univerzita v Liberci
    The compatibility of polyorganylsiloxanes and high-molecular polymers used as emulsifiers was evaluated. The surface and bulk properties of the studied compounds were evaluated using the solubility parameters (δ). It is shown that the copolymers of acrylic acid compound – polyacrylamide and hydrolyzed polyacrylamide, as well as polyvinyl alcohol without residual acetate groups in the macromolecule have the highest degree of incompatibility with polyorganylsiloxanes. It was established that the presence of residual acetate groups in the macromolecule of polyvinyl alcohol leads to an increase in the degree of compatibility of polymers. The calculated data on the fractions of solubility parameters and cohesive energy of polyorganylsiloxanes and emulsifying polymers are presented. The contributions of the components of polymers cohesive energy due to the fractions of dispersion interaction αd, dipole-dipole interaction αdd, and hydrogen bonding αh, as well as their influence on the degree of solubility of the polymer – emulsifier system, are shown. The choice of polyvinyl alcohol with residual acetate groups as an emulsifier for polyorganylsiloxanes is theoretically substantiated based on the concept of the solubility parameter as a measure of the affinity of the system components. The developed approach to assessing the compatibility of the polymer – emulsifier system is of practical importance for the creation of polymer compositions in the finishing works.
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    IMPROVEMENT OF FLAME RETARDANT AND ANTIBACTERIAL PROPERTIES OF COTTON-POLYESTER BLEND FABRICS
    (Technical University of Liberec, ) HOROKHOV, IHOR; KULISH, IRINA; ASAULYUK, TATYANA; SARIBYEKOVA, YULIA; SEMESHKO, OLGA; MYASNYKOV, SERGEY; Technická univerzita v Liberci
    The fire retardant and antibacterial characteristics of cotton-polyester blend fabric have been improved. A composition has been developed for complex finishing of fabric using a phosphorus-containing substance on a biological basis, which, due to its high phosphorus content, can provide a fire-retardant function to textile material, as well as increase its antimicrobial properties. The thermal characteristics of treated textile materials have been studied and it has been established that the presence of phytic acid at the initial stage of destruction shifts the temperature towards lower values due to the activation of phytic acid degradation before the decomposition of the main substrate. The maximum temperature at which the final destruction of the cotton-polyester fabric occurs shifts to higher temperatures from 507°C for the untreated fabric to 565°C for the treated fabric, and the presence of dry residue increases by more than 2.5 times, which proves an increase in the heat resistance of the textile material. The length of the damaged area in the vertical combustion test was 6.5 cm, and the absence of drop formation of the polyester component was also noted, which eliminates the potential destructive effect due to the possible formation of additional fire areas. An increase in fabric antimicrobial activity is confirmed by a zone of inhibition of 2 – 4 mm around the sample using the diffusion method with gram-positive bacteria Staphylococcus pyogenes, as well as a pronounced growth inhibition of microorganisms around fabric samples examined by the method of inoculation of microflora from the environment. Treatment with the studied composition improves washing resistance and does not impair the mechanical properties of the textile material by increasing the degree of crosslinking of the polymer components used in the finishing composition.