Capacity of thiourea Schiff base esters as multifunctional additives: synthesis, characterization and performance evaluation in polyol. Issue 110 (22nd October 2015)

• Record Type: Journal Article
• Authors: Singh, Raj K.; Kukrety, Aruna; Sharma, Om P.; Thakre, Gananath D.; Atray, Neeraj; Ray, Siddharth S.
• Is Part Of: RSC advances. Volume 5:Issue 110(2015)
• Page Start: 90367
• Page End: 90373
• Publication Date: 2015-10-22
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra13507a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Novel thiourea Schiff base esters evaluated by a four ball test as multifunctional additives in polyol base oil showing excellent antifriction activity and moderate anti-wear properties. Abstract : A novel thiourea Schiff base esterTSBE was synthesized following a two step reaction. At first, thiourea and salicylaldehyde were reacted in ethanol to obtain thiourea Schiff baseTSB . In the second step, esterification ofTSB was done with lauroyl chloride catalyzed by 4-(dimethylamino)pyridine (DMAP) in N, N -dimethylacetamide (DMAc) solvent to obtain the final productTSBE . The synthesized compounds were characterized using CHN analysis, FT-IR and NMR. The antioxidant properties of this additive were assessed via the universal oxidation test (IP-306) and rotary bomb oxidation test (ASTM D2272) while antifriction and antiwear properties were evaluated in terms of the average friction coefficient and average wear scar diameter respectively by doing the four ball test (ASTM D4172). Studies revealed thatTSBE had good antioxidant properties. Tests carried out by a four ball test machine indicated that the additiveTSBE could reduce the friction to 45.6% and wear to ∼20% when compared with the pure polyol base oil.