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<p>Phragmites karka (PPh), an invasive macrophyte species from the brackish coastal wetlands of Odisha, was utilized as a reinforcing agent in polypropylene (PP) composites. The PP/PPh composites were produced through melt blending at 185&#xa0;°C with a rotational speed of 50&#xa0;rpm for 10&#xa0;min, followed by injection molding at 190&#xa0;°C under 35&#xa0;MPa pressure. Mechanical testing of the PP/Phragmites composites, across varying PPh loadings, revealed enhancements in tensile strength, flexural modulus, and impact resistance compared to virgin PP. Additionally, the effects of various compatibilizers, such as maleic anhydride-grafted PP (MAH-g-PP) and glycidyl methacrylate-grafted PP (GMA-g-PP), on the mechanical, thermal, and morphological properties were investigated. The incorporation of 30% PPh and 2% GMA-g-PP compatibilizer resulted in a 53.24% increase in tensile modulus over virgin PP. Similarly, flexural strength and modulus showed substantial improvements, increasing by 47.80% and 108.06%, respectively, compared to neat PP. Thermogravimetric analysis (TGA) indicated enhanced thermal stability in the composites. Scanning electron microscopy (SEM) analysis revealed noticeable changes in the composite morphology.</p>

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Exploring resource potential of Phragmites karka – an invasive macrophyte for development of reactively compatibilized polypropylene composites

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • Swati Mondal,
  • Tanusree Bera,
  • Smita Mohanty

摘要

Phragmites karka (PPh), an invasive macrophyte species from the brackish coastal wetlands of Odisha, was utilized as a reinforcing agent in polypropylene (PP) composites. The PP/PPh composites were produced through melt blending at 185 °C with a rotational speed of 50 rpm for 10 min, followed by injection molding at 190 °C under 35 MPa pressure. Mechanical testing of the PP/Phragmites composites, across varying PPh loadings, revealed enhancements in tensile strength, flexural modulus, and impact resistance compared to virgin PP. Additionally, the effects of various compatibilizers, such as maleic anhydride-grafted PP (MAH-g-PP) and glycidyl methacrylate-grafted PP (GMA-g-PP), on the mechanical, thermal, and morphological properties were investigated. The incorporation of 30% PPh and 2% GMA-g-PP compatibilizer resulted in a 53.24% increase in tensile modulus over virgin PP. Similarly, flexural strength and modulus showed substantial improvements, increasing by 47.80% and 108.06%, respectively, compared to neat PP. Thermogravimetric analysis (TGA) indicated enhanced thermal stability in the composites. Scanning electron microscopy (SEM) analysis revealed noticeable changes in the composite morphology.