Publications Internationales

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Author: search.filters.author.Bezzazi, B.Has files: No

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    Study of rheological characteristics and mechanical strength properties of natural rubber vulcanizates varying the type and content of carbon black
    (ICAT, 2023) Kherbouche, Ahlem; Benidir, A.; Bezzazi, B.
    This paper presents a study about the influence of the size and content of two types of carbon black N220 and N550 with loading of 10–100 phr on the properties of the vulcanized natural rubber (NR). The mechanical characteristics such as the tensile strength, the tensile modulus, the elongation at break, the hardness, the abrasion resistance, and rheological properties of NR reinforced with carbon black were investigated. By analyzing the results of an N220 reinforced NR, the reinforcement gives improvement in tensile strengths when fillers are added up to 70 phr. However, and by referring to elongation at break, a fall of product elasticity is observed. The increase of filler loading results a decrease in rheological properties; optimum cure time, scorch time, cure rate index (CRI). Nevertheless, the N220 rubber compound exhibits slightly higher hardness than those registered for the N550 compounds. Regarding the mechanical properties under tensile stress, the engineer's findings are comparative for all the samples of the study. However, the rubber compound filled N220 or N550 gives comparable results on mechanical properties.
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    The effect of carbon black on the curing and mechanical properties of natural rubber/ acrylonitrile- butadiene rubber composites
    (Universidad Nacional Autonoma de Mexico, 2021) Boukfessa, Hind; Bezzazi, B.
    The present work investigates the effect of the amount of carbon black on curing and mechanical properties such as tensile strength, elongation at break, hardness and abrasion resistance of the natural rubber (NR)/ acrylonitrile-butadiene rubber (NBR) blend. For that purpose, a blend composed of 65% NR and 35% NBR filled with different content of carbon black N330 was used. The curing results indicate that the viscosity and the crosslink density of rubber composites increase and the scorch and curing times decrease with increasing the filler content. Mechanical properties such as tensile modulus and hardness of the CB filled NR/NBR blend were remarkably improved, indicating the inherent reinforcing potential of CB. Regarding tensile strength and abrasion resistance, they increase with the addition of carbon black, up to 50 phr. After that, these properties decrease slightly with filler addition