The physical and mechanical properties, as well as structural and rheological indices of blended compositions based on viscous oil road bitumen and three specific grades of butadiene-styrene thermoplastic elastomers (KRATON 0243, KRATON 0246, KRATON 1192) of different composition and structure are investigated. The structure and properties of initial butadiene-styrene thermoplastic elastomers are considered. The influence of the polymer modifier topology on the properties of the final blended bitumen-polymer compositions has been shown. It is established that the change of polymer composition affects the whole complex of technical, technological and operational indicators of polymer-bitumen binders. Thus, the presence of 75% diblock structures in KRATON 0243 and 55% diblock structures in KRATON 0246 significantly affect both penetration and ductility of bitumen-polymer mixtures at 0 deg. С.

Keywords: butadiene-styrene thermoplastic elastomers of various topologies, viscous petroleum road bitumen