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<p>The paper presents the results of a study of the influence of the content of fibrous basalt (FBS) within 1.0, 3.0, 5.0, 10, 15, 20 mass % on the pattern of change in specific volume from temperature for composites obtained on the basis of ethylene/hexene copolymer (EHC). Using the stepwise dilatometry method, the glass transition temperature values were determined, which increased from − 123 to − 52&#xa0;°C with an increase in the content of fibrous basalt. The study of the kinetic regularities of isothermal crystallization made it possible to determine the mechanism of the growth process of crystalline formations in composites based on EHC + FBS. In accordance with the Kolmogorov–Avrami equation, the values of <i>K</i> and <i>n</i> were determined, according to which the mechanism and type of growth of crystalline formations were established depending on the content of fibrous basalt. With an increase in the filler content from 1.0 to 20 mass %, the mechanism of the crystallization process changed from a three-dimensional spherulitic formation to a two-dimensional plate-like and then one-dimensional rod-like type of growth of crystalline structures with the continuous formation of homogeneous and heterogeneous nucleation centers. Using the derivatographic analysis method, the values of the melting temperature range, thermal destruction temperature and melting enthalpy were determined. It was shown that with 20 mass % fibrous filler content, the melting temperature of the composite decreased from 122 to 119&#xa0;°C, and the enthalpy of melting from 176 to 154&#xa0;J&#xa0;g<sup>−1</sup>. Electronic images of composites are provided depending on the filler content in the composites. According to X-ray phase analysis data, the degree of crystallinity of the composites decreased from 75 to 54%. The discovered patterns of change in the thermophysical properties and degree of crystallinity of the composites under consideration clearly indicate the validity of the statement about the change in the mechanism of isothermal crystallization depending on the content of fibrous basalt.</p>

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Structural features and isothermal crystallization mechanism of composites based on ethylene/hexene copolymer and fibrous basalt

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • Najaf T. Kakhramanov,
  • Ofelya M. Guliyeva,
  • Khayala V. Allahverdiyeva,
  • Fatima A. Mustafayeva,
  • Yunis N. Gahramanli,
  • Bakhtiyar A. Mamedov,
  • Nushaba B. Arzumanova,
  • Fikret A. Guliyev,
  • Rena V. Gurbanova,
  • Hokuma B. Bafadarova

摘要

The paper presents the results of a study of the influence of the content of fibrous basalt (FBS) within 1.0, 3.0, 5.0, 10, 15, 20 mass % on the pattern of change in specific volume from temperature for composites obtained on the basis of ethylene/hexene copolymer (EHC). Using the stepwise dilatometry method, the glass transition temperature values were determined, which increased from − 123 to − 52 °C with an increase in the content of fibrous basalt. The study of the kinetic regularities of isothermal crystallization made it possible to determine the mechanism of the growth process of crystalline formations in composites based on EHC + FBS. In accordance with the Kolmogorov–Avrami equation, the values of K and n were determined, according to which the mechanism and type of growth of crystalline formations were established depending on the content of fibrous basalt. With an increase in the filler content from 1.0 to 20 mass %, the mechanism of the crystallization process changed from a three-dimensional spherulitic formation to a two-dimensional plate-like and then one-dimensional rod-like type of growth of crystalline structures with the continuous formation of homogeneous and heterogeneous nucleation centers. Using the derivatographic analysis method, the values of the melting temperature range, thermal destruction temperature and melting enthalpy were determined. It was shown that with 20 mass % fibrous filler content, the melting temperature of the composite decreased from 122 to 119 °C, and the enthalpy of melting from 176 to 154 J g−1. Electronic images of composites are provided depending on the filler content in the composites. According to X-ray phase analysis data, the degree of crystallinity of the composites decreased from 75 to 54%. The discovered patterns of change in the thermophysical properties and degree of crystallinity of the composites under consideration clearly indicate the validity of the statement about the change in the mechanism of isothermal crystallization depending on the content of fibrous basalt.