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<p>Polypropylene (PP) composites reinforced with talc microparticles is one of the most widespread polymer composite materials. However, its thermal, mechanical and fracture behavior under different conditions is not explored more. In order to design better PP/talc structures and predict their failure in the context of its aging and degradation. The present work investigates the influence of thermal ageing (60&#xa0;°C for 3–14 days), water immersion (distilled and seawater, 30 days), and ultraviolet exposure (30 days) on the mechanical and thermal properties of PP/talc microcomposites containing 50 wt% talc. Tensile tests reveal a reduction in ultimate strength from 40&#xa0;MPa (unaged) to 35&#xa0;MPa after thermal ageing and to 20&#xa0;MPa following UV exposure, the latter corresponding to a 50% loss together with a decrease in ultimate strain from 0.13 to 0.05. Water ageing induces a 28% decrease in tensile strength. Vickers hardness decreases from 4.69&#xa0;MPa to 3.23&#xa0;MPa under UV ageing. DSC and TGA analyses confirm that UV radiation causes the most pronounced thermal degradation, lowering the onset degradation temperature from 510&#xa0;°C to 455&#xa0;°C, whereas thermal ageing produces less effects than UV radiations. These findings provide insight into the durability of PP/talc composites under various service environments.</p>

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Effects of different ageing on structural, mechanical and thermal properties of polypropylene/talc microcomposites

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Kada Boukourou,
  • Mokhtar Khaldi,
  • Sahnoun Zengah,
  • Mohamed Mokhtar Bouziane,
  • Sathish Kumar Palaniappan,
  • Manoj Kumar Singh,
  • Bel Abbes Bachir Bouiadjra,
  • Ahmed Yahiaoui,
  • Sanjay Mavinkere Rangappa,
  • Suchart Siengchin

摘要

Polypropylene (PP) composites reinforced with talc microparticles is one of the most widespread polymer composite materials. However, its thermal, mechanical and fracture behavior under different conditions is not explored more. In order to design better PP/talc structures and predict their failure in the context of its aging and degradation. The present work investigates the influence of thermal ageing (60 °C for 3–14 days), water immersion (distilled and seawater, 30 days), and ultraviolet exposure (30 days) on the mechanical and thermal properties of PP/talc microcomposites containing 50 wt% talc. Tensile tests reveal a reduction in ultimate strength from 40 MPa (unaged) to 35 MPa after thermal ageing and to 20 MPa following UV exposure, the latter corresponding to a 50% loss together with a decrease in ultimate strain from 0.13 to 0.05. Water ageing induces a 28% decrease in tensile strength. Vickers hardness decreases from 4.69 MPa to 3.23 MPa under UV ageing. DSC and TGA analyses confirm that UV radiation causes the most pronounced thermal degradation, lowering the onset degradation temperature from 510 °C to 455 °C, whereas thermal ageing produces less effects than UV radiations. These findings provide insight into the durability of PP/talc composites under various service environments.