Viscosity characteristics of synthetic aviation oils at low temperatures

Exponential dependence between the values of kinematic and dynamic viscosity of low-viscous synthetic oils was ascertained. Coefficients for the values conversion were found. Dynamic viscosity was evaluated using the Reotest-2 device in the range from 20 to -40° C. Bases of synthetic oils were chosen as objects of the study, i.e. diisooctyl ester of sebacic acid, ether of pentaerythritol and synthetic fatty acids of C5-C9 fraction, gas-paraffin base IPMA-10 and marketable oils on their basis. It is established that the most sloping curve and the lowest value of viscosity at negative temperature are characteristic of diester and isoparaffin oil. Lo-temperature viscosity of the oils increases considerably with introduction of functional additives to the bases.