Siberian Federal University

The paper presents a comparative analysis of vulcanizing systems for rubbers based on nitrile butadiene rubber BNKS‑18 and their adhesive interaction with ultra ‑high molecular weight polyethylene (UHMWPE). It has been shown that a system containing dicumyl peroxide (DCP), sulfur and vulcanization accelerators 2‑mercaptobenzothiazole (MBT) and dithiodimorpholine (DTDM) provides the best physical and mechanical properties of rubber due to the formation of an optimally cross‑linked structure. An adhesion study between UHMWPE and BNKS‑18 revealed that the DTDM+S+MBT system yields the highest peel strength, but failure is adhesive. The DTDM+DCP+MBT vulcanizing system exhibits moderate adhesive strength but results in cohesive failure. Exposure of samples with this system to AMG‑10 synthetic oil for 30 days confirmed the stability of interfacial contact, which indicates the formation of strong bonds. IR spectroscopy revealed chemical interactions between the rubber compound ingredients upon the introduction of sulfur, but showed no changes at the interface between UHMWPE and the rubber. Microstructural analysis demonstrated that the use of dicumyl peroxide promotes the formation of a tight interfacial bond between the rubber and UHMWPE without micro-delamination