Browsing by Author "BAHLOULI Safieddine"

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    Effect of Fiber Loading on Thermal Properties of Cellulosic Washingtonia Reinforced HDPE Biocomposites
    (Polymers, 2023-06-30) BAHLOULI Safieddine
    In this research work, we aim to study the effect of the incorporation of vegetable fiber reinforcement on the thermo-mechanical and dynamic properties of a composite formed by a polymeric matrix reinforced with cellulosic fibers with the various Washingtonia fiber (WF) loadings (0%, 10%, 20%, and 30% by wt%) as reinforced material in high-density polyethylene (HDPE) Biocomposites to evaluate the optimum fiber loading of biocomposites. In addition, several characterization techniques (i.e., thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and thermal mechanical analysis (TMA)) were used to better understand the characteristics of the new composites prepared. With these techniques, we managed to verify the rigidity and thermal stability of the composites so elaborated, as well as the success of the polymer and the structural homogeneity of the obtained biocomposites. Hence, the biocomposite with the best ratio (HDPE/20WF) showed a loss modulus (E00) of 224 MPa, a storage modulus (E0) of 2079 MPa, and a damping factor (Tan ) of 0.270 to the glass transition (Tg) of 145 C. In addition, thermomechanical analysis (TMA) of the biocomposite samples exhibited marginally higher Ts compared to the HDPE matrix. The best results were recorded with biocomposites with 20% WF, which showed better thermal properties. This composite material can be used as insulation in construction materials (buildings, false ceilings, walls, etc.).
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    Influence of nanosized CaCO3 content in tailoring the structure, the morphology and the thermal and mechanical properties of iPP/PA66/PP-g-MA alloy
    (INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION, 2021-03-29) BAHLOULI Safieddine; MAKHLOUF Azedine; HADDAOUI Nacerdine
    Nanocomposites of Polypropylene/Polyamide 66 (iPP/PA66) with a weight ratio of (70/30) filled with stearic acid-treated nanosized CaCO3 were melt compounded in the presence of a fixed amount of grafted polypropylene maleic anhydride (PP-g-MA) in a Brabender mixer. The purpose of this research is to obtain nanocomposites with high-performance structural, morphological, and thermomechanical properties. The obtained properties are discussed in light of the content of nano-CaCO3 and of the induced interfacial bonding properties generated by the insertion of the compatibilizer. The results confirmed that, according to the FTIR spectroscopy analysis, the existence, on one hand of possible interactions between PP-g-MA and PA66 and, on the other hand, between stearic acid and PA66. XRD results show that nanosized CaCO3 particles play the role of nucleating agents in the matrix and thus increasing the crystallinity of the blend. SEM results revealed that the treated nanosized CaCO3 was more homogeneously dispersed in the (iPP/PA66), and a refinement of the morphology and better dispersion of the filler were detected after the addition of PP-g- MA. From the mechanical point of view; the incorporation of CaCO3 increased appreciably the tensile strength at break and the tensile modulus of (iPP/PA66) blend
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    Influence of nanosized CaCO3 content in tailoring the structure, the morphology and the thermal and mechanical properties of iPP/PA66/PP-g-MA alloy
    (INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION, 2021-03-30) BAHLOULI Safieddine; MAKHLOUF Azzedine; HADDAOUI Naceredine
    Nanocomposites of Polypropylene/Polyamide 66 (iPP/PA66) with a weight ratio of (70/30) filled with stearic acid-treated nanosized CaCO3 were melt compounded in the presence of a fixed amount of grafted polypropylene maleic anhydride (PP-g-MA) in a Brabender mixer. The purpose of this research is to obtain nanocomposites with high-performance structural, morphological, and thermomechanical properties. The obtained properties are discussed in light of the content of nano-CaCO3 and of the induced interfacial bonding properties generated by the insertion of the compatibilizer. The results confirmed that, according to the FTIR spectroscopy analysis, the existence, on one hand of possible interactions between PP-g-MA and PA66 and, on the other hand, between stearic acid and PA66. XRD results show that nanosized CaCO3 particles play the role of nucleating agents in the matrix and thus increasing the crystallinity of the blend. SEM results revealed that the treated nanosized CaCO3 was more homogeneously dispersed in the (iPP/PA66), and a refinement of the morphology and better dispersion of the filler were detected after the addition of PP-g- MA. From the mechanical point of view; the incorporation of CaCO3 increased appreciably the tensile strength at break and the tensile modulus of (iPP/PA66) blend.