THE TECHNOLOGY OF PERM POLYTECHNIC SCIENTISTS WILL HELP MAKE PLANES, CARS AND BUILDINGS STRONGER

13 July 2022 127

In the process of gamma and microwave flooding of polymers, their structure changes significantly, this leads to a change in their physicomechanical properties. The main chain of the molecule can break down, forming smaller fragments, or "cross-link" with adjoining ones. According to scientists, materials processed using such technologies are eco-friendly.

— Polymer composites based on a three-dimensionally cross-linked elastomeric matrix filled with solid particles are used in car industry, aircraft industry and shipbuilding, as well as in solid rocket-engine propellant. Abrasive materials that contain corundum allow for high-quality sanding. Flexible polymers filled with quartz are used to cover buildings and flooring in sports facilities. Despite this fact, there are no researches, which conducted to study the effect of radiation on such materials, - said the associate professor of the Department of Applied Physics of Perm Polytechnic University, Candidate of Physical and Mathematical Sciences Ergash Nurullaev.

The researchers studied how the mechanical characteristics of polymer composites based on low-molecular rubbers change under the influence of various doses of gamma and microwave irradiation.

In the first experiment, the strength of materials increases with increasing radiation dose, reaching a maximum at a value of 20 Mrad. An increase of test temperature, on the contrary, leads to a decrease of strength. Scientists said, this can be explained by the fact that when the radiation dose increases, cross linking degree of polymer composite molecules gains.

In the second case, the mechanical characteristics of polymers change at the specific density of absorbed power of microwave radiation 126.9 MJ/m3.

According to the researchers, it is possible to obtain stronger goods using microwave technologies.

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