潤滑油の平均分子量及び環分析

抄録

The calculation of the mean molecular weight of petroleum oils has been researched with kinematic viscosity measurements at 37.8°C and 98.9°C by ASTM D 2502-87. The author toward this method has devised the estimation method, which is the calculation with kinematic viscosity measurements of lubricating oil at 40°C and 100°C by the change of Alfred E. Hirschlers formulas with a few deviation and this calculating method is applicable to oils with viscosity indices between-50-+120.
And the calculation of carbon distribution and structural group analysis of petroleum oils can be researched with measurements of refractive index, density and mean molecular weight by ASTM D 3238-85.
The results of calculation of oils can be used for the following: -
(1) adjunct to the bulk properties in monitoring the manufacture of lubricating oils.
(2) comparing the composition of stocks from different crude sources.
(3) correlativity with critical product performance properties.