Synthesis and Lubricating Properties of Plasma Polymerized Waste Vegetable Oil

Polymerized oils(WPAR and WPN2) with high viscosity were obtained by argon and nitrogen plasma polymerization of waste vegetable oil(WO). As shown by GPC and 1H NMR analysis, the plasma polymers WPAR and WPN2, which consisted of dimers and higher molecular weight oligomers of WO, were obtained by the chain growth polymerization of the diradical intermediate and Diels Alder addition. The results from the four ball tester demonstrated that the PB values of WPAR and WPN2 reached 803.6 N and 1 254.0 N, respectively, both surpassed the load carrying capacity of mineral oil 150BS with the same viscosity grade. With the same tested loads the wear scar diameters(WSD) of WPN2 were all smaller than those of WPAR, which showed excellent anti wear ability. Compared to mineral oil 150BS, WPN2 showed better friction reducing performance.