Green lubricating oil additives

摘要

By increasing the world awareness for the importance of green lubricants and green lubricating oil additives, six terpolymers based on (alkylacrylate: Jojoba: alkylacrylate) were prepared via free radical chain polymerization, using (1: 1: 1) molar ratios. The prepared terpolymers were elucidated using Fourier Transform Infrared Spectroscopy (FTIR), Proton Nuclear Magnetic Resonance (1H-NMR), Gel Permeation Chromatography (GPC) for determining the weight average molecular weight (Mw) and the thermal stability of the prepared polymers was determined. The prepared terpolymers were evaluated as viscosity index improvers and pour point depressants for lubricating oil. It was found that the viscosity index (VI) increase with increasing concentration of the prepared terpolymers till 3.00% by weight, by studying the effect of the prepared terpolymers composition on VI it was found that VI increase with increasing the molecular weight and alkyl chain length from A-D terpolymers, while VI decrease for E and F terpolymers.The efficiency of the prepared terpolymers as pour point depressants (PPDs) was studied and it was found that they are efficient as PPDs for lube oil (SAE-30) free of additives, and their efficiency increase by decreasing concentration of the prepared terpolymers. By studying the effect of alkyl chain length on the efficiency of the prepared terpolymers as PPDs it was found that the effect of (A-C) terpolymers was excellent, (D and E) terpolymers have moderate effect, while (F) terpolymer have weak effect.