Hamma, ADairi, BBouhelal, S2023-05-302023-05-302022-01-01A. Hamma1,2,*, B. Dairi3, S. Bouhelal,VALORIZATION OF DATE SEEDS WASTES AS REINFORCEMENT FOR STARCH-GRAFTED-POLYPROPYLENE COMPOSITES . Journal of Fundamental and sciences. vol.14, no 1. January 2022. Faculty of exact sciences. university of el oued. [visited in 01/01/2022]. available from [ amelhamma@yahoo.fr]http://dspace.univ-eloued.dz/handle/123456789/25090articlePaper discusses the possibility of incorporation of date seed waste as fillers (DSF) into starch-g-PP matrices compared to kenaf fibers (KF with two lengths) based composites. Three starch-g-PP matrices (G906PF, G906PJ and G720PJ) were studied in parallel to a fully PP one. The investigated composites loaded to 20 wt.%, showed differences in performance related, principally, to loading type (DSF, KF) and matrix used. Results showed an improvement of tensile and impact stress at break as well as Shore D hardness of starch-g-PP composites reinforced with date seed fillers (DSF) or kenaf fibers (KF). Further, tensile, storage and loss moduli increased also with loading. Vicat softening point of either KF or DSF/starch-g-PP composites was greater with higher values for KF composites. However, thermal stability of starch-g-PP composites was better when DSF was usedenDate seed fillers, starch-g-polypropylene, bio-composites, mechanical properties, waste valorizationArticle