DYNAMIC AND PHYSICO-MECHANICAL PROPERTIES OF VULCA-NIZATES BASED ON BLENDS OF BUTADIENE-STYRENE RUBBER AND FUNCTIONALIZED POLYMER OBTAINED BY LIQUID-PHASE COMBINATION OF THEIR LATEXES

OSCXAZ

Abstract

Nanomaterials attract a lot of attention due to their unique properties, such as their very small size, large surface area and surface activity. Such nanofillersare used in formulations of rubber compounds in order to improve the physico-mechanical and dynamic properties of vulcanizates.Styrene butadiene rubber (BSС) is a commercially successful synthetic elastomer with excellent manufacturability and a constant increase in demand for it in the development of "green" tires with good dynamic and physico-mechanical properties, low rolling resistance and better grip on wet roads. However, BSC is sensitive to heat, light and oxygen due to the unsaturated molecular structure. Consequently, its mechanical properties deteriorate during the operation of products based on it and their service life is shortened. The use of nanofillers, which can give resistance to oxidation and improve physicо-mechanical and dynamic properties, is of interest both from a scientific and practical point of view.This paper presents the results of a study of the dynamic and physico-mechanical properties of filled rubbers based on styrene-butadiene rubber SKS-30 ARKM-15. It is modified by a nanodisperse functionalized polymer (FP) synthesized from styrene, divinylbenzene and ethyleneglycoldimethacrylate. For the purpose of uniform dispersion of FP particles in a rubber matrix, a method of liquid-phase combination of their latexes was used. The granulometric compositions of latex particles SKS-30 ARKM-15, functionalized polymer and their mixed latex were studied by the method of dynamic light scattering. The surface tension of the latexes is determined by the ring separation method (Du Nouy method). The effect of the FP content on the dynamic and physico-mechanical properties of the resulting reinforced composite is investigated. The research uses standard methods for determining the elastic-strength properties of rubbers. The physico-mechanical properties of rubbers based on the initial rubber SKS-30 ARKM-15 and its modified samples were studied before and after thermo-oxidative aging at a temperature of 100 ° C for 24 hours. Their dynamic properties (modulus of elasticity and tangent of the loss angle) were determined by the method of dynamic thermomechanical analysis. Composites based on rubbers modified with a functionalized polymer in the amount of 10wt.h. per 100 wt.h. of rubber are characterized by improved dynamic and physico-mechanical properties.The study was conducted using the equipment of the Center for Collective Use "Nanomaterials and Nanotechnology" of the Kazan National Research Technological University.