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ISSN Imprimir: 2572-4258
ISSN On-line: 2572-4266
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STRUCTURE AND PROPERTIES OF ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE FILLED WITH TUNGSTEN BORIDE AND CARBON BLACK
RESUMO
Ultrahigh molecular weight polyethylene (UHMWPE)-based composites filled with tungsten boride W2B5 and carbon black were obtained by ball milling with subsequent consolidation by hot isostatic pressing. The structure, mechanical properties, thermal conductivity, and thermal expansion of the composites were investigated. It was shown that ball milling results in the formation of a composite structure with nearly homogeneous distribution of inorganic fillers in the polymer matrix. Composite samples possess high mechanical properties that are kept even at elevated temperatures. The experimental density of composites agrees well with the theoretical value, which is an evidence of nearly the absence of pores. The thermal conductivity of composites was obtained to be 3.5−4.5 times higher than that for a pure UHMWPE, whereas the thermal expansion coefficient was obtained to be 1.5−2 times less than for a pure UHMWPE, such properties seem to be advanced for possible application of composites.