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Citation: YANG Pan-Longa, ZHAO Hong-Bina, TAN Yuan-Qiangb, LIU Ren-Dec, HAN Li-Fenb, LIU Yan-Lia. Synthesis,Characterization and Tribological Properties of 2-(Piperidine-1-carbonothioylthio) Acetate Derivatives as Lubricant Additives[J]. Chinese Journal of Applied Chemistry, ;2007, 24(3): 251-255. shu

Synthesis,Characterization and Tribological Properties of 2-(Piperidine-1-carbonothioylthio) Acetate Derivatives as Lubricant Additives

1.
a College of Chemistry, Xiangtan University, Xiangtan 411105;
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b College of Mechanical Engineering, Xiangtan University, Xiangtan 411105;
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c Company of Equipments Examination, Shanghai Baogang, Shanghai

Corresponding author: ZHAO Hong-Bina,
Received Date: 12 March 2006
Available Online: 6 May 2006
Fund Project: 国家自然科学基金(5005018) (5005018)湖南省科技攻关(03GKY30301) (03GKY30301)湖南省中青年基金(01JZY100)资助项目 (01JZY100)

Five novel compounds as lubricating additives were synthesized from the reaction of sodium piperidine-1-carbodithioate with chloroacetate. Molecular structures of the compounds were confirmed by IR, UV, ¹H NMR, ¹³C NMR, MS and elemental analysis. They are soluble in many organic solvents(liquid paraffin, acetate, rapeseed oil) and insoluble in water. Liquid paraffin was used as a base oil in the work. The thermal stability of the novel compound was evaluated by thermogravimetric analyses(TGA) at a rate of 10℃/min under nitrogen atmosphere. The five derivatives all thermally decompose at above 195℃, and the last degradation point appears at 400℃, indicating that they may be used as the additive of conventional lubrication oil additives. The maximum non-seizure load values(P_B values) of the synthetic compounds as additives in liquid paraffin was evaluated with a four-ball machine. The results show that these compounds as additives in liquid paraffin increase the load-carrying capacity. The maximum no-seizure load(866 N) of the oil sample containing 1.0% the novel additive is almost near to the ZDDP(882 N).
- lubricant additive,
- synthesis,
- characterization,
- tribological performance
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