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From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials

Author

Listed:
  • Carlos Bruno Barreto Luna

    (Academic Unit of Materials Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, Brazil)

  • Wallisson Alves da Silva

    (Academic Unit of Mechanical Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, Brazil)

  • Edcleide Maria Araújo

    (Academic Unit of Materials Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, Brazil)

  • Lara Júlia Medeiros Dantas da Silva

    (Academic Unit of Materials Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, Brazil)

  • João Baptista da Costa Agra de Melo

    (Academic Unit of Mechanical Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, Brazil)

  • Renate Maria Ramos Wellen

    (Department of Materials Engineering, Federal University of Paraíba, Cidade Universitária, João Pessoa 58051-900, Brazil)

Abstract

This work investigated the effect of thermo-oxidation aging in blends of copolymer polypropylene (PPc)/recycled copolymer polypropylene (PPcr) from industrial container waste, coded as PPc/PPcr blends. All compounds were melt extruded, and the injection molded specimens were characterized by mechanical properties (tensile and impact), Fourier-transform infrared spectroscopy (FTIR), melt flow index (MFI), contact angle, heat deflection temperature (HDT), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). FTIR spectra presented bands related to the hydroperoxides and carbonyl groups, as resulted from thermo-oxidation aging. The contact angle decreased upon a thermo-oxidation aging influence, corroborating the FTIR spectra. PPcr presented higher MFI as a consequence of reprocessing. Impact strength and elongation at break were quite sensible to the thermo-oxidation aging influence and were progressively reduced upon increased time, whereas tensile strength, elastic modulus, and HDT only slightly changed. SEM images of PPc presented a higher quantity of pulled-out particles, resulted from a lower interaction between phases, i.e., polypropylene and ethylene/propylene. From the impact strength and toughness data, proper dissipation energy mechanisms were found in PPc/PPcr blends. Summing up, using PPcr contributed to minimize properties’ losses, which may be related to the stabilizer agents, whereas the described results presented great potential for the PP market, while contributing to the sustainable environment.

Suggested Citation

  • Carlos Bruno Barreto Luna & Wallisson Alves da Silva & Edcleide Maria Araújo & Lara Júlia Medeiros Dantas da Silva & João Baptista da Costa Agra de Melo & Renate Maria Ramos Wellen, 2022. "From Waste to Potential Reuse: Mixtures of Polypropylene/Recycled Copolymer Polypropylene from Industrial Containers: Seeking Sustainable Materials," Sustainability, MDPI, vol. 14(11), pages 1-25, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:11:p:6509-:d:824744
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    References listed on IDEAS

    as
    1. Carlos Bruno Barreto Luna & Danilo Diniz Siqueira & Eduardo da Silva Barbosa Ferreira & Wallisson Alves da Silva & Jessika Andrade dos Santos Nogueira & Edcleide Maria Araújo, 2020. "From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as a Polystyrene Impact Modifier," Sustainability, MDPI, vol. 12(13), pages 1-21, June.
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