▎ 摘　　要

This study compares the reinforcing effects of graphene nanoplatelets (GNP), graphene oxide (GO), and halloysite nanotubes (HNTs) in polypropylene (PP) based nanocomposites with PP-g-maleic anhydride (MAPP) as compatibilizer. PP/GNP/MAPP, PP/GO/MAPP, and PP/HNTs/MAPP nanocomposites were fabricated at nanofillers contents 1, 2, 3, 4 parts per hundred (phr) and MAPP at 4 phr, to PP matrix, using melt extrusion and injection molding techniques. Results show that at nanofillers optimum content, PP/GNP3/MAPP nanocomposite increased in tensile strength and modulus by 8% and 96%, respectively, compared to pure PP (p < 0.05). PP/GNP3/MAPP nanocomposite also increased in tensile strength and modulus by 2% and 4% respectively, compared to PP/GO2/MAPP (p < 0.05) and 2% and 15% compared to PP/HNTs2/MAPP (p < 0.05) nanocomposites. For impact strength performance, PP/GNP2/MAPP nanocomposite increased in impact strength (notched) by 104% compared to pure PP (p < 0.05). Also, PP/GNP2/MAPP nanocomposite increased in impact strength by 23% compared to PP/GO1/MAPP (p < 0.05) and 13% compared to PP/HNTs1/MAPP (p < 0.05), nanocomposites. In flexural properties, PP/GO4/MAPP nanocomposite increased in flexural strength and modulus by 24% and 28%, respectively, compared to pure PP (p < 0.05). Also, PP/GO4/MAPP nanocomposite increased in flexural strength and modulus by 4% and 9%, respectively, compared to PP/GNP2/MAPP nanocomposite, and 9% and 21% respectively compared to PP/HNTs2/MAPP nanocomposite. PP/GNP2/MAPP nanocomposite increased in thermal stability by 12 degrees C compared to pure PP; 29 degrees C compared to PP/GO2/MAPP; and 15 degrees C compared to PP/HNTs2/MAPP nanocomposites. Overall, PP/GNP/MAPP nanocomposite exhibited superior mechanical properties and thermal stability compared to PP/GO/MAPP and PP/HNTs/MAPP nanocomposites. PP/GO/MAPP was superior for bending properties while PP/HNTs/MAPP was best for ductility.