Scholarlink

<p>Recycled polypropylene (r-PP) offers a sustainable and cost-effective alternative to virgin PP, but its mechanical and thermal properties tend to degrade upon repeated processing. To address this limitation, agricultural byproducts rich in polyphenols and pectin were evaluated as multifunctional bio-fillers. In this study, grape seed powder (GP), tea leaf powder (TP), and orange peel powder (OP) were incorporated at 3 wt% and 5 wt% loadings into r-PP and subjected to two extrusion cycles. The bio-fillers functioned not only as reinforcing agents but also imparted antioxidant and nucleating effects, thereby enhancing thermo-mechanical stability and recyclability. Fourier-transform infrared spectroscopy (FTIR) confirmed interfacial interactions between the fillers and the polymer matrix. Among the composites, r-PP/GP at 3 wt% exhibited the highest tensile strength, whereas r-PP/OP at 5 wt% demonstrated superior tensile performance. Additionally, OP-filled composites showed the greatest impact strength. Thermal analyses revealed that TP and OP improved oxidative stability, although the Thermo gravimetric Analysis (TGA) onset temperature decreased slightly due to the thermally labile components of the fillers. Overall, this study highlights the potential of GP, TP, and OP as sustainable bio-fillers for enhancing the mechanical performance, thermal stability, and circular utilization of r-PP.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancing the thermo-mechanical properties and recyclability of recycled polypropylene (r-PP) using bio fillers

  • 期刊论文

  • 发表日期：

    2026年3月24日

查看全文
  • Bhim Singh,
  • Manish Jain,
  • Sudhir G. Warkar

摘要

Recycled polypropylene (r-PP) offers a sustainable and cost-effective alternative to virgin PP, but its mechanical and thermal properties tend to degrade upon repeated processing. To address this limitation, agricultural byproducts rich in polyphenols and pectin were evaluated as multifunctional bio-fillers. In this study, grape seed powder (GP), tea leaf powder (TP), and orange peel powder (OP) were incorporated at 3 wt% and 5 wt% loadings into r-PP and subjected to two extrusion cycles. The bio-fillers functioned not only as reinforcing agents but also imparted antioxidant and nucleating effects, thereby enhancing thermo-mechanical stability and recyclability. Fourier-transform infrared spectroscopy (FTIR) confirmed interfacial interactions between the fillers and the polymer matrix. Among the composites, r-PP/GP at 3 wt% exhibited the highest tensile strength, whereas r-PP/OP at 5 wt% demonstrated superior tensile performance. Additionally, OP-filled composites showed the greatest impact strength. Thermal analyses revealed that TP and OP improved oxidative stability, although the Thermo gravimetric Analysis (TGA) onset temperature decreased slightly due to the thermally labile components of the fillers. Overall, this study highlights the potential of GP, TP, and OP as sustainable bio-fillers for enhancing the mechanical performance, thermal stability, and circular utilization of r-PP.