الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Modern lubricating greases contain a variety of chemical substances ranging from complicated mixtures of natural hydrocarbons in the base oils through well defined soap structures and complex organic molecules in the additives. Thus the more practical greases were lubricants which has been thickened in order that it remain in contact with the moving surfaces and did not leak out under gravity or centrifugal action and or be squeezed out under pressure. Thus a major practical problem was the provision of a structure which will stand up under varying temperatures to which it may be subjected during use shear. This study was undertaken with the aim of attempting to prepare different compounds from azine and azole derivatives as antioxidants for lithium lubricating grease. These compounds are 1- (2 – amino -3 – cyano - 6 – pyridyl ) o – hydroxyl cinnamic hydrazide), 2-(ethoxymethyl enamino derivative and 3-(3 – amino – 5 – hydroxyl – 4 phenylazo -1H– pyrazole). First part of this work introduces the theoretical background and the relevant subjects concerning the preparation of lubricating greases, and their additives. The second part explained the methods and techniques in addition to the raw materials which had been utilized throughout the course of this thesis. The physico-chemical characteristics of the all the raw materials and the prepared greases under investigation were determined using standard methods of analysis. These include penetration, dropping point, apparent viscosity, oxidation stability, total acid number and oil separation. In addition, the rheological behavior and flow parameters had been carried out at different temperatures. The greases were evaluated and classified according to the National Lubricating Grease Institute (NLGI) and Egyptian Standard (ES).