RHEOLOGICAL PROPERTIES OF HYDROCARBON SYSTEMS WITH A HIGH CONTENT OF RESINS AND ASPHALTENES

The physicochemical properties of the investigated hydrocarbon media — oils and high-boiling fractions — are presented. Based on the rheological characteristics, the type of fl uids has been determined in accordance with the Newton law, as well as the presence of viscosity anomaly of the investigated media at various temperatures. The values of the oil thixotropy energy, as well as of the viscous fl ow activation energy of the studied systems, have been obtained. Phase transition of high-boiling fractions at 60o C has been revealed. The dependences of the viscous fl ow entropy of investigated hydrocarbon media on increase in the temperature from 10 to 140o C have been obtained. The dependences of the frequency of jumps of hydrocarbon system molecules on viscosity have been obtained for the fi rst time.
   
Author:  A. A. Boitsova and N. K. Kondrasheva
Keywords:  rheology, multicomponent hydrocarbon medium, high-boiling fraction, oil, structural-mechanical properties, viscous fl ow activation entropy, frequency of molecule jumps, hysteresis loop, thixotropy energy, phase transition.
Page:  1038