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<p>In this study, modified fly ash (m-flyash) and modified halloysite nanotubes (m-HNTs) are incorporated into an epoxy/polyester (EP) matrix to improve the mechanical and thermal properties of polymer composites. Various composites with varying m-flyash and m-HNTs loadings were prepared and their tensile, flexural, impact and thermal properties were carefully analyzed. At 5 wt% m-flyash, the tensile strength peaks at 39.10&#xa0;MPa due to enhanced interfacial bonding caused by better miscibility and homogenous dispersion. At the same filler content, flexural strength also exhibits a significant improvement peaks at 92.45&#xa0;MPa. Up to 2 wt% flyash, impact strength increases; after that, it falls because of decreased matrix deformability. Analysis of surface morphology shows that agglomeration occurs at higher loadings, whereas effective dispersion occurs at lower filler concentrations. The composite containing 3 wt% m-HNTs and 5 wt% m-flyash showed better thermal stability as demonstrated by thermogravimetric analysis (TGA). Significant chemical interactions are also shown by FTIR; the epoxy resin exhibits aromatic C = C stretching and C-H stretching vibrations from methylene groups. Unsaturated bonds and significant absorption peaks confirm the improved bonding and compatibility between the nanofillers and matrix, which improves the mechanical and thermal properties.</p>

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Fabrication of epoxy/polyester based hybrid composites reinforced with modified flyash and HNTs with improved thermo-mechanical properties

  • 期刊论文

  • 发表日期：

    2025年7月21日

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  • Anand Maurya,
  • Pradeep Kumar,
  • Shishir Sinha

摘要

In this study, modified fly ash (m-flyash) and modified halloysite nanotubes (m-HNTs) are incorporated into an epoxy/polyester (EP) matrix to improve the mechanical and thermal properties of polymer composites. Various composites with varying m-flyash and m-HNTs loadings were prepared and their tensile, flexural, impact and thermal properties were carefully analyzed. At 5 wt% m-flyash, the tensile strength peaks at 39.10 MPa due to enhanced interfacial bonding caused by better miscibility and homogenous dispersion. At the same filler content, flexural strength also exhibits a significant improvement peaks at 92.45 MPa. Up to 2 wt% flyash, impact strength increases; after that, it falls because of decreased matrix deformability. Analysis of surface morphology shows that agglomeration occurs at higher loadings, whereas effective dispersion occurs at lower filler concentrations. The composite containing 3 wt% m-HNTs and 5 wt% m-flyash showed better thermal stability as demonstrated by thermogravimetric analysis (TGA). Significant chemical interactions are also shown by FTIR; the epoxy resin exhibits aromatic C = C stretching and C-H stretching vibrations from methylene groups. Unsaturated bonds and significant absorption peaks confirm the improved bonding and compatibility between the nanofillers and matrix, which improves the mechanical and thermal properties.