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Citation: LIAO De-Zhong, ZHANG Tai-Ming, WANG Su-Qin, MAO Li-Xin, XU Yi-Xue. Synthesis and Lubricity of Complex Esters of Vegetable Oil Acid Neopentyl Glycol and Terephthalic Acid[J]. Chinese Journal of Applied Chemistry, ;2010, 27(2): 159-163. doi: 10.3724/SP.J.1095.2010.90140 shu

Synthesis and Lubricity of Complex Esters of Vegetable Oil Acid Neopentyl Glycol and Terephthalic Acid

a. Department of Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000;
b. Department of Chemistry and Chemical Engineering, Central South University, Changsha

Received Date: 27 February 2009
Revised Date: 4 July 2009

An intermediate was prepared by the esterification of neopentyl glycol with paraphthaloyl chloride. The polymerization degree of the intermediate was between 3.5 and 1.45 as n(NPG)/n(TPA) was increased from 2.4 to 3.0. The yield of the intermediate was 75.5%. The complex ester was produced by esterification of the intermediate with oleic acid with a yield of 88.5%. The result shows that the viscosity was improved with the increase of the molecular mass of the product,the viscosity at 100℃ was between 17.8~27.6 mm²/s,the viscosity index was more than 125,solidifying point was below -27℃,the oxidative stability was also improved with the increase of the molecular mass of the product. The biodegradabilities of complex esters were more than 70%. The value of P_B was 784 N,the value of wear diameter was 0.41 mm,the temperature of thermal decomposition was above 250℃. The complex esters can be used as excellent green lubricants.
- neopentyl glycol,
- paraphthaloyl chloride,
- oleic acid,
- rapeseed acid,
- complex ester,
- lubricity
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