INFLUENCE OF THERMOMECHANICAL TREATMENT CONDITIONS ON TECHNICAL PROPERTIES OF BASED RUBBERS BUTYL REGENERATE

UDC 678.046

  • Shashok Zhanna Stanislavovna − DSc (Engineering), Associate 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

DOI: https://doi.org/10.52065/2520-2669-2022-259-2-13-18

Key words: butyl regenerate, rubber, tensile strength, elongation at break, heat aging.

For citation: Shashok Zh. S. Influence of thermomechanical treatment conditions on technical properties of based rubbers butyl regenerate. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2022, no. 2 (259), pp. 13–18 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2022-259-2-13-18.

Abstract

The influence of thermomechanical treatment conditions on the technical properties of elastomeric compositions from butyl regenerate was determined. The objects of study were vulcanizates based on compositions from butyl regenerate obtained by radiation exposure with irradiation doses of 30 kGy (BR (30)) and 50 kGy (BR (50)) and additionally subjected to thermomechanical treatment in a pin extruder. It has been determined that rubbers based on butyl regenerate BR (50) have 1.63–2.16 times higher conditional tensile stress and 1.09–1.32 times higher relative elongation at break compared to rubbers based on BR regenerate (30). It was found that with an increase in temperature and intensity of mechanical action, the elastic-strength properties of rubbers based on BR (50) increase. It has been established that during the process of thermal aging of rubbers based on butyl regenerate, structuring processes prevail in the volume of rubbers, leading to an increase in the conditional tensile strength and a decrease in relative elongation at break. At the same time, rubbers based on BR (30) are characterized by smaller changes in the main indicators of elastic-strength properties. Features of the technical properties of rubbers based on butyl regenerate are due to differences in the structure of the spatial network formed during vulcanization.

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08.04.2022