Modification of Ultra-High-Molecular-Weight Polyethylene by Nanostructured B4C/W Composites under Intensive Mechanical Activation Conditions
S. A. KOVALEVA1, V. I. ZHORNIK1, T. F. GRIGOR’EVA2, M. A. BELOTSERKOVSKII1, P. A. VITYAZ1, A. D. DUBINCHUK3, and N. Z. LYAKHOV2
1United Institute of Mechanical Engineering, National Academy of Sciences of Belarus, Minsk, Belarus
E-mail: sveta_kovaleva@tut.by
2Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Belarusian State University, Minsk, Belarus
Keywords: mechanical activation, mechanocomposites, boron carbide, tungsten, ultra-high-molecular-weight polyethylene, FT-IR spectroscopy
Pages: 489-494
Abstract
Structural transformations of a powder mixture of ultra-high-molecular-weight polyethylene and nanostructured B4C/W composite were explored by X-ray diffraction, scanning electron microscopy, and FT-IR spectroscopy. The mixture was treated in a high-energy planetary ball mill. It was demonstrated that scaly-shaped polymer composite particles of a 160–400 µm size were generated during mechanical activation. Boron carbide and tungsten particles sized 1–5 and 0.1–0.2 µm, respectively, were evenly distributed therein. The interaction between mixture components during intensive mechanical deformations is accompanied by the crosslinking and decomposition of polymer molecules. As a consequence, there are a decrease in the molecular mass of the polymer and the lack of its extensive oxidative decomposition in this case.
DOI: 10.15372/CSD20180506
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