Structure and Properties of Films and Coatings Made of a Styrene-Butadiene Thermoplastic Elastomer

This study is devoted to the establishment of the connection of antibacterial surface properties with the structure and composition of coatings based on a styrene-butadiene thermoplastic elastomer with polylactide and antibacterial agents: tetramethylenediethylenetetramine or distearyldimethylammonium chloride. It is shown that the mechanism of antibacterial action of the composition is based on the leaching (release) of antibacterial agents in an aqueous environment together with microorganisms. The effect depends on the structural organization of the coating, which accelerates their leaching and is enhanced by the inclusion of antibacterial agents in the hydrolyzed phase of the polylactide, which is localized in the styrene-butadiene matrix around the polystyrene domains. The features of the structure of the films and coatings are established by scanning electron microscopy (SEM), using a paramagnetic probe, physical and mechanical parameters, and by studying the laws of thermal destruction using thermogravimetry.

Automated summary

This study investigates the connection between the antibacterial surface properties and the structure and composition of coatings made from a styrene-butadiene thermoplastic elastomer, polylactide, and antibacterial agents. The research demonstrates that the antibacterial action of the coating is based on the release of antibacterial agents in an aqueous environment along with microorganisms. The leaching process is influenced by the structural organization of the coating and is enhanced by incorporating antibacterial agents in the hydrolyzed phase of the polylactide.