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<p>Medical products such as mesh implants should demonstrate high material quality and long service life in different environments over several years. Polypropylene (PP) is a thermoplastic widely used for medical applications due to its mechanical properties, biocompatibility, and chemical resistance. This study examines the effect of thermal treatment on the mechanical, thermal, and chemical properties of polypropylene homopolymer (PP-H) and random copolymer (PP-RC), with and without the addition of palmitic acid (PA) to simulate lipid exposure during implantation. Mechanical and thermal properties of PA-treated PP-H as analysed by tensile test, differential scanning calorimetry, and thermogravimetric analysis, showed a higher tensile strength, elastic modulus, and thermal stability than PP-RC. Fourier-transform-infrared spectroscopy detected no significant chemical changes after thermal treatment, whereas in Raman spectroscopy changes in the intensity of the peaks and new peaks due to PA were visible. In conclusion, PA incubation accelerated material degradation, with PP-H demonstrating superior stability in the mechanical and thermal properties under the tested conditions.</p>

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Influence of palmitic acid and temperature on the behaviour of polypropylene films for medical uses

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月6日

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  • Gülayşe Gürsoy Sayed,
  • Vera Kozjak-Pavlovic,
  • Alexandru Sover

摘要

Medical products such as mesh implants should demonstrate high material quality and long service life in different environments over several years. Polypropylene (PP) is a thermoplastic widely used for medical applications due to its mechanical properties, biocompatibility, and chemical resistance. This study examines the effect of thermal treatment on the mechanical, thermal, and chemical properties of polypropylene homopolymer (PP-H) and random copolymer (PP-RC), with and without the addition of palmitic acid (PA) to simulate lipid exposure during implantation. Mechanical and thermal properties of PA-treated PP-H as analysed by tensile test, differential scanning calorimetry, and thermogravimetric analysis, showed a higher tensile strength, elastic modulus, and thermal stability than PP-RC. Fourier-transform-infrared spectroscopy detected no significant chemical changes after thermal treatment, whereas in Raman spectroscopy changes in the intensity of the peaks and new peaks due to PA were visible. In conclusion, PA incubation accelerated material degradation, with PP-H demonstrating superior stability in the mechanical and thermal properties under the tested conditions.