Publications Internationales

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Subject: search.filters.subject.Polypropylene

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    Improving the Environmental Sustainability through Efficient Recycling and Valorization of Polypropylene (PP)/Polyamide 66 (PA66)/Nanoclay Nanocomposite Blends with Recycled Polypropylene
    (Taylor and Francis Ltd, 2024) Sid, Asma Nour El Houda; Kouini, Benalia; Bezzekhami, Mohammed Amin
    Polypropylene/polyamide 66 composites were enhanced by introducing a polypropylene anhydrous melamine graft agent (PP-g-AM) and by adding different contents of recycled polypropylene (rPP). The composite was prepared using an internal mixer. Our research described here aimed to investigate the processing, production, and characteristics of the synthesized nanocomposites. The properties and structure of the mixtures were summarized to determine the optimal ratio of adding rPP in the nanocomposite (rPP/PP-g-AM/PA66). To comprehend the impact of rPP on the properties of the nanocomposite and the effectiveness of adding rPP for polymer blends/clay nanocomposites, we performed a rheological study and evaluated the mechanical, thermal, and barrier properties. X-ray diffraction analysis demonstrated the formation of an exfoliated structure of the mixtures of PP/PP-g-MA/PA66 reinforced with rPP. Through significant mechanical improvement, the mixtures showed better resistance to impact forces. Thermal analysis highlighted an increase in the mixtures’ stability under heat. Additionally, the carefully designed mixtures presented interesting barrier qualities.
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    Modification of diss fibers for biocomposites based on recycled Low-Density polyethylene and polypropylene blends
    (Springer, 2019) Touati, Zohra; Boulahia, Hakima; Belhaneche-Bensemra, Naima; Massardier, Valérie
    The aim of this work is the valorization of diss fibers with recycled and regenerated low-density polyethylene (rLDPE) for the development of biocomposites based on blends of rLDPE polypropylene (PP) and diss fibers. The diss fibers were characterized by laser granulometer and FTIR spectroscopy. Two PP/rLDPE blends of different compositions (50/50 and 75/25) were prepared. These polymer blends were reinforced by nano-Si particles and compatibilizers which were investigated using three compatibilizers: maleic anhydride functionalized ethylene copolymer rubber (MAC), maleic anhydride functionalized ethylene copolymer rubber/SiO2 (MAC/SiO2), and maleic anhydride functionalized ethylene copolymer rubber/SiO2/ionic liquid (MAC/SiO2/IL). The thermal properties of the blends were studied using differential scanning calorimetry and thermogravimetric analysis. Their crystallinity was investigated by X-ray diffraction and their morphology by scanning electron microscopy, while mechanical properties were evaluated by tensile testing. The best tensile properties were obtained for the PP/rLDPE (75/25) blend. A significant increase of the Young’s modulus, stress at break, and elongation at break was obtained with the three compatibilizers. MAC acted as a compatibilizer of both polymers, resulting in improved interfacial adhesion which increased tensile properties. Finally, the effect of diss fiber surface modification on the properties of PP/rLDPE blends was considered. The results showed a modification of tensile properties and a satisfactory interfacial adhesion between diss fibers and polymer blends. Furthermore, thermal stability was not significantly decreased by the addition of 5 wt% diss fibers
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    Analysis and quantitative estimation of phenolic antioxidants in polypropylene packaging for fat products
    (Freund Publishing House, 2018) Baloul, Hakim; Belhaneche-Bensemra, Naima; Bernaldo De Quirós, Ana Rodriguez; Sendon, Raquel
    The aim of this work was to study the interactions between polypropylene (PP) food packaging for fatty products (margarine) and food simulant. For this purpose, a simulant (olive oil) was used in two different temperatures (20°C and 40°C). The interaction phenomena were investigated according to the rate of mass variation of PP samples with time and by using Fourier transform infrared spectroscopy, scanning electron microscopy and high-performance liquid chromatography (HPLC). The results showed the presence of two phenomena – migration of additives and sorption of the simulant, with the phenomena more pronounced at 40°C. Furthermore, the HPLC analysis identified the presence of Irganox 1010 and Irgafos 168 as antioxydants and allowed to carry out a kinetic study of Irganox 1010 migration. The concentration of Irganox 1010 decreased from 13.35 to 4.76 mg/kg at a temperature of 40°C and to 5.85 mg/kg at a temperature of 20°C after 10 days of contact with olive oil. The Irgafos 168 migration could not be evaluated because it is very sensitive to oxidation.
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    Investigation on improving properties of polypropylene-based nanocomposites by employing Algerian nanoclay
    (Springer link, 2020) Triaki, M.; Benmounah, A.; Zenati, A.
    A study was conducted to evaluate the influence of nanoclay on the final properties of polypropylene-based nanocomposites. Polypropylene/nanoclay nanocomposites with a varied content of nanoclayranging from 0 wt% to 11 wt% were prepared using a co-rotating twin screw extruder. The polypropylene-grafted maleic anhydride (PP-g-MA) was used as a compatibilizer to improve the dispersibility of the nanoclay. Properties and characteristics of nanoclay and PP/PP-g-MA/nanoclay nanocomposites were investigated by means of laser diffraction spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffractometer, ZWICK/ROELL testing machine, capillary rheometer, thermogravimetry/differential scanning calorimetry and scanning electron microscopy. The results of morphological characterization indicated that the dispersion and the distribution of the charges are the essential characteristics likely to influence the mechanical, rheological, thermal and morphological properties of the nanocomposites. Thus, the results manifested that the incorporation of a small amount of nanoclay had a significant effect on the final properties of nanocomposites
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    Combustion behavior of polypropylene/polyamide66/clay nanocomposites
    (Wiley, 2017) Benalia, Kouini; Serier