MECHANOCHEMICAL SYNTHESIS OF POLYMER-CONTAINING COMPOSITES BASED ON BORON NITRIDE
T. F. GRIGOREVA1, S. A. KOVALEVA2, V. I. ZHORNIK2, P. A. VITYAZ2, N. Z. LYAKHOV1
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Joint Institute of Mechanical Engineering, Belarusian National Academy of Sciences, Minsk, Belarus
Keywords: механохимический синтез, механокомпозиты, железо, нитрид бора, сверхвысокомолекулярный полиэтилен, ультрадисперсный политетрафторэтилен, mechanochemical synthesis, mechanocomposites, iron, boron nitride, ultra-high molecular weight polyethylene, ultra-dispersed polytetrafluoroethylene
Pages: 262-266
Abstract
The effect of high-energy mechanical treatment on the formation of the structural-phase state of highly filled composite powders UHMWPE/BN, UPTFE/BN, UHMWPE/Fe/BN, UPTFE/Fe/BN is investigated. Mechanochemical synthesis of composites was carried out in a water-cooled planetary ball mill in the atmosphere of argon. The phase composition and structural characteristics were studied with the D8 Advance diffractometer (BRUKER). It was established that Fe/BN composites are formed as a result of mechanical treatment for 2 min in the mixture of iron with hexagonal boron nitride; in addition, the phases of cubic boron nitride, c BN, iron nitride, FeN0.056, and iron boride, Fe2B, appear. During the mechanochemical synthesis of the composites of Fe/BN with polymers UHMWPE and UPTFE, the size of the crystallites of cubic boron nitride increases slightly. Activation of the mixtures of polymers with hexagonal BN is not accompanied by the transition of hexagonal boron nitride to the cubic modification. Grinding of hexagonal BN crystallites is slower than in the mixtures with Fe/BN composite. IR spectroscopic studies showed that the size of the original particles of hexagonal BN affects the change in the supramolecular structure of the polymer, while the polymer molecules are not destroyed.
DOI: 10.15372/CSD2019136
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