TECHNICAL PROPERTIES OF RUBBERS WITH A NEW VULCANIZATION ACTIVATOR

UDC 678.046

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

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

Karmanova Olga Viktorovna – DSc (Engineering), Professor, Head of the Department of Organic Compounds Technology, Polymer Processing and Technological Safety. Voronezh State University of Engineering Technologies (19 Revolutsii Ave., 394036, Voronezh, Russian Federation). E-mail: karolga@ mail.ru

Golyakevich Aleksandr Aleksandrovich – PhD student, the Department of Organic Compounds Technology, Polymer Processing and Technological Safety. Voronezh State University of Engineering Technologies (19 Revolutsii Ave., 394036, Voronezh, Russian Federation). E-mail: sasha4292@yandex.ru

DOI: https://doi.org/10.52065/2520-2669-2025-289-3.

Key words: bentonite, zinc oxide, tensile strength, elongation at break, heat aging resistance, crosslinking density.

For citation: Leshkevich A. V., Shashok Zh. S., Uss E. P., Krotova O. A., Karmanova O. V., Golyakevich A. A. Technical properties of rubbers with a new vulcanization activator. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2025, no. 1 (289), pp. 18–26 (In Russian). DOI: 10.52065/2520-2669-2025-289-3.

Abstract

The influence of various vulcanization activators on the technical properties of vulcanizates based on various general purpose rubbers has been established. The objects of study were elastomeric compositions based on natural rubber and styrene-butadiene rubber, containing new complex vulcanization activators with a reduced dosage of zinc oxide. The work used complex vulcanization activators in the form of an alloy of stearic acid, bentonite and zinc oxide in various ratios of mineral components, obtained at temperatures of 70, 90 and 110°C. It has been shown that partial replacement of zinc oxide with new components with a minimum dosage of bentonite in their composition has virtually no effect on the basic physical and mechanical properties of rubber. At the same time, vulcanizates are characterized by increased elastic characteristics, as evidenced by higher values of elongation at break in the case of rubbers based on styrene-butadiene rubber. When studying the effect of new additives in rubber compositions based on natural rubber, a decrease in the relative tensile strength of vulcanizates was revealed both before and after thermal aging compared to a composition containing zinc oxide. It has been established that the introduction of complex vulcanization activators, obtained at a temperature of 110°C, into elastomeric compositions based on the rubbers under study makes it possible to obtain rubbers that are not inferior in thermal-oxidative resistance to vulcanizates with zinc oxide. At the same time, it was determined that partial replacement of zinc oxide with bentonite leads to a slight decrease in the cross-linking density of vulcanizates, with the exception of components obtained at 110°C.

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11.11.2024