TECHNICAL PROPERTIES OF TYRE RUBBERS WITH VARIOUS DOSAGES OF COUPLING AGENT

UDC 678.046

Lyushtyk Andrey Yur’yevich – Chief Chemist – Head of the Laboratory. JSC “Belshina” (Minskoye shosse str., 213824, Bobruisk, Republic of Belarus). E-mail: jb133xxxx@gmail.com

Shashok Zhanna Stanislavovna – DSc (Engineering), Professor, Professor, the Department of Polymer Composite Materials. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: shashok@belstu.by

Uss Elena Petrovna – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Polymer Composite Materials. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: uss@belstu.by

Krotova Olga Aleksandrovna – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Polymer Composite Materials. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: o.krotova@belstu.by

Leshkevich Anastasiya Vladimirovna – PhD (Engineering), Senior Lecturer, the Department of Polymer Composite Materials. Belarusian State Technological University (13a Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: nastyonke@mail.ru

DOI: https://doi.org/10.52065/2520-2669-2025-289-2.

Key words: styrene-butadiene rubber, natural rubber, rubber, silica filler, coupling agent, strength, tear resistance.

For citation: Lyushtyk A. Yu., Shashok Zh. S., Uss E. P., Krotova O. A., Leshkevich A. V. Technical properties of tyre rubbers with various dosages of coupling agent. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2025, no. 1 (289), pp. 12–17 (In Russian). DOI: 10.52065/2520-2669-2025-289-2.

Abstract

The technical properties of rubbers based on a combination of solution butadiene-styrene and natural rubbers containing silica filler and coupling agent in different dosages were investigated. Elastomeric compositions based on rubbers of the DSSK-2163PF and TSR-20 brands were used as objects of study. Highly dispersed silica filler Extrasil 150VD was used in the work in a dosage of 75 parts by weight per 100 parts by weight of rubber. Silane of the X 50-S brand, which is a mixture of bifunctional sulfur-containing organosilane and technical carbon, was used as a coupling agent. It was determined that an increase in the coupling agent dosage leads to an increase in the conventional stress at 100% elongation by 13.3–26.7%, a decrease in the conventional tensile strength by 8.1–8.7%, relative elongation at break by 12.8–17.9% and tear resistance by 11.9–13.5%. However, determination of changes in the main technical properties after thermal aging showed that compositions with a higher coupling agent dosage are characterized by greater resistance to thermal-oxidative processes occurring under the influence of elevated temperature and atmospheric oxygen. At the same time, the elastomer composition with 12 parts by weight silane grade X 50-S under certain aging conditions has the smallest change in the conventional tensile strength and relative elongation at break. The nature of the change in the technical properties of tire rubbers is due to the ability of sulfur-containing organosilane to decompose at the vulcanization temperature with the formation of elemental sulfur, which subsequently participates in the formation of the structure of the vulcanization network, which determines the differences in the main technical indicators of tire rubbers and their resistance to thermal aging.

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11.11.2024