Antioxidant synergism between synthesised alkylated diphenylamine and dilauryl thiodipropionate in polyolefin base fluid

Stabilizing sunflower biodiesel with synthetic antioxidant blends

“…Amine-based primary oxidants are also known but most studies on vegetable oils and other ester derivatives are limited to the phenolic types. Secondary antioxidants are hydroperoxide decomposers and include organic sulfur or phosphorus compounds [2,3,[6][7][8]. They function by converting the hydroperoxides to inactive non-radical compounds such as alcohols.…”

Effect of alkylated diphenylamine on thermal-oxidative degradation behavior of poly-α-olefin

“…Accelerated oxidation tests (AOT) were carried out in a high-temperature drying oven produced by Tianjin Zhonghuan experimental furnace Co. Alkylated diphenylamine (ADPA) was synthesized by alkylation of diphenylamine with styrene according to our previous study (Chao at al., 2014). It was presumed that the major component of ADPA has the structure shown in Fig.…”

Composition and degradation of turbine oil sludge

“…Although it has been reported that the degradation is caused by an autocatalytic reaction, the degradation mechanism of turbine oil is very complicated [25][26][27]. Air and water combined with localized high temperatures or static electricity are the main causes of oil oxidation and degradation [28].…”

“…As shown in Scheme 2, the oxidation process is trigged by the breaking up of a-H atom in the turbine oil. Following this, the formed alkyl radicals rapidly combine with O 2 and the remaining alkylperoxyl radicals then capture hydrogen from unreacted groups to propagate the process [25]. Free radicals combined with hydrocarbons generate more hydrocarbon radicals and alcohols, aldehydes, ketones and carboxylic acids, which lead to the formation of degradation products by condensation polymerization, in which way sludge makes the primary product of oxidation [29].…”