Preparation and evaluation of some newly liquid crystal as antioxidant for base stocks
Publish place: Iranian Chemical Communication، Vol: 6، Issue: 4
Publish Year: 1397
Type: Journal paper
Language: English
View: 339
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Document National Code:
JR_ICC-6-4_005
Index date: 24 September 2019
Preparation and evaluation of some newly liquid crystal as antioxidant for base stocks abstract
Four liquid crystal compounds of the form, 2-Sec-butyl-4-[(4-x-phenyl) diazenyl) phenyl-4-(octadecyloxy] benzoate symbolized as I18a, I18b, I18c and I18d were prepared in which the substituent (X) was taken CH3O-, CH3-, Br- and -NO2 respectively. Characterization of prepared compounds is done using FT-IR, 1H-NMR, Mass Spectroscopy and Elemental Analysis.. Their mesophase behavior was investigated by Differential Scanning Calorimetry (DSC). Their antioxidant efficiency for Egyptian lubricating base oil was tested. The oxidation processes was monitored using the change in the Total Acid Number (TAN). The obtained results showed that, the efficiency of these compounds was ranked as follows I18d > I18c > I18b > I18a.
Preparation and evaluation of some newly liquid crystal as antioxidant for base stocks Keywords:
Preparation and evaluation of some newly liquid crystal as antioxidant for base stocks authors
Ashraf Ashmawy
Chemistry Department, Faculty of Science (boys), AL-Azhar University, ۱۱۸۸۴, (EGYPT).
Maher Nessim
Egyptian Petroleum Research Institute, Evaluation and Analysis Department.
Doaa Osman
Egyptian Petroleum Research Institute, Evaluation and Analysis Department.
El Sayed Elnaggar
Chemistry Department, Faculty of Science (boys), AL-Azhar University, ۱۱۸۸۴, (EGYPT).
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