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<p>The Rotational Moulding (RM) process is widely used for producing products with simple to complex geometries due to its simplicity. Polyethylene (PE) and Polypropylene (PP) are suitable polymeric materials used in the RM process. Discontinuities caused by complex geometries or material defects in RM products can lead to crack development. Crack formation and its progression often result in premature failure of RM products. Many times, toughness (the area under the stress–strain curve) is used to predict resistance to fracture, as fracture toughness (resistance to crack growth) is not widely recognized in the RM industry. Although the toughness value of PE was found to be quite high compared to PP, the evaluation of fracture toughness clearly indicated that PE has poorer crack growth resistance than PP. Understanding fracture toughness provides a clearer insight into crack growth resistance.</p>

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Study of fracture toughness of PP and PE materials used in rotational moulding

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • S. N. Pozhil,
  • Vikas Chaudhari,
  • Sachin D. Waigaonkar,
  • Harichandra Chandekar

摘要

The Rotational Moulding (RM) process is widely used for producing products with simple to complex geometries due to its simplicity. Polyethylene (PE) and Polypropylene (PP) are suitable polymeric materials used in the RM process. Discontinuities caused by complex geometries or material defects in RM products can lead to crack development. Crack formation and its progression often result in premature failure of RM products. Many times, toughness (the area under the stress–strain curve) is used to predict resistance to fracture, as fracture toughness (resistance to crack growth) is not widely recognized in the RM industry. Although the toughness value of PE was found to be quite high compared to PP, the evaluation of fracture toughness clearly indicated that PE has poorer crack growth resistance than PP. Understanding fracture toughness provides a clearer insight into crack growth resistance.