Abstract
The effect of the temperature mode of reactive extrusion on the main physicomechanical characteristics of nanocomposites based on copolymers of ethylene with butylene and ethylene with hexene and natural minerals (clinoptilolite and vesuvian) is studied. The optimal temperature mode of extrusion of nanocomposites based on copolymers of ethylene and natural minerals is established. At a maximum extrusion temperature of 230°C in the dosing zone, the counterflow increases, promoting a rise in the residence time of the nanocomposite melt and, accordingly, a decrease in extruder productivity. The possibility of mechanochemical synthesis of nanocomposites vulcanized with dicumyl peroxide on an extruder using a monotreme technology has been proved. It is found that the vulcanization of the copolymer composing nanocomposites based on ethylene copolymers results in an increase in the ultimate tensile stress up to 10% and a decrease in the elongation at break. A rise in the maximum extrusion temperature in the extruder head to 230°C does not lead to formation of counterflow. At the same time, it has been shown that, with an increase in the temperature mode of extrusion of the vulcanized nanocomposites over 200°C, the time spent by the melt in the material cylinder remains almost unchanged. A fundamental feature of the effect of chemical crosslinking with dicumyl peroxide on the processing and the regularity of changes in the properties of nanocomposites is established. The effect of the vulcanization in the melt of the polymer matrix on the reactive extrusion and the structural features and properties of nanocomposites are defined.
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Kakhramanov, N.T., Bayramova, I.V. & Guliev, A.J. Reactive Extrusion of Nanocomposites Based on Ethylene Copolymers and Mineral Fillers. Inorg. Mater. Appl. Res. 12, 1332–1337 (2021). https://doi.org/10.1134/S2075113321050142
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DOI: https://doi.org/10.1134/S2075113321050142