EVALUATION OF OPTIMAL MODES AND CONDITIONS OF ULTRASONIC EXPOSURE TO UNCURED POLYMERS FOR THE DEVELOPMENT OF TECHNOLOGY FOR THE CREATION OF HIGH-STRENGTH COMPOSITES

V.D. Minakov, R.N. Golykh, P.V. Petrekov, V.N. Khmelev
DOI: 10.25699/SSSB.2021.40.6.044 Download PDF
Abstract: The modern development of machinery, instrumentation, medicine, transport, aviation and rocket and space technology is determined by the new construction materials created with improved mechanical properties. The main task of today is to create new samples of materials by solving two mutually exclusive tasks - simultaneously ensuring low specific gravity and high strength properties of materials. A promising and successfully developing direction for solving this problem is the creation and application of polymer materials that are more than 5 times lighter than traditional metals and alloys. However, it is impossible to ensure the necessary strength properties of polymers without modifying their physical structure with the help of ultrasonic action. Existing methods of modifying the structure based on the introduction of chemical additives, improving some properties of the material, worsen other properties. Therefore, it is necessary to consider physical ways of modifying the structure. To date, one of the promising physical methods is ultrasound exposure. The article describes the results of experimental studies to identify the optimal intensity of ultrasonic vibrations, providing maximum efficiency of mechanodestruction of macromolecules. The revealed optimal conditions of action (in terms of the distance between the radiator and the reflector) made it possible to increase the strength of the composite by 44% compared with non-optimal conditions under which ultrasonic dispersion of the filler increases the strength by 30%.
Index terms: polymer, composite, ultrasonic, macromolecule, breakup, cavitation.

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