▎ 摘　　要

Development and the required availability of energy resources, especially oil, drew attention to developing methods for transporting high-viscosity and high-pour-point petroleum crude efficiently at a reasonable cost. For this purpose, graphite was oxidized and reacted with oleic acid to alter the GO's surface hydrophobically. Poly(octadecyl acrylate-co-vinyl neodecanoate) (PODA-co-VND) was prepared at different molar ratios of monomers and used as a waxy oil pour point depressant. The OL-GO had been incorporated in various proportions within the monomers, ranging from 0.1 to 0.5%, to produce polymer nanohybrids. The polymers and polymer nanohybrids were characterized using FTIR, XRD, Raman spectroscopy, SEM, TEM, and TGA instruments. XRD confirmed the increase in the d-spacing between the GO layers after the polymerization process. By testing the prepared polymers as depressors of the oil pour point, it was found that the polymer with the monomers' molar ratio of 1:1 was the most efficient, as it achieved a reduction of 12 degrees C, while the polymer hybrid with the same molar ratio attained a reduction of more than 30 degrees C. This decrease in the oil pour point results in a massive improvement in the viscosity as it is reduced by approximately 86% using the hybrid polymer. The optical microscope showed very tiny crystals after treatment with the hybrid polymer compared to the polymer. The results also showed that on increasing the GO percentage in the polymer, the crude oil's pour point and viscosity improved.