RHEOLOGICAL PROPERTIES OF A LOW-TEMPERATURE GEL-FORMING COMPOSITION BASED ON INORGANIC COMPONENTS

Abstract

The results of rheological measurements of a low-temperature composition based on inorganic components developed at the Institute of Petroleum Chemistry SB RAS (GALKA®) are presented. The studies were carried out with a Haake Viscotester IQ rheometer using CC25 geometry (oscillation mode at a frequency of 1 Hz) at different temperatures. The amplitude test determined the range of strain and stress amplitude values corresponding to the range of linear viscoelasticity. For a given value of the deformation amplitude from the range of linear viscoelasticity, the dependences of the complex viscosity modulus (|η*|), the elastic modulus (storage modulus, G´), and the viscosity modulus (loss modulus, G´´) on time were recorded at a temperature of 38, 30, and 20 °С. The kinetics of the gel formation process was characterized, the maximum strength of the formed structure was estimated from the maximal elastic modulus, the time of its formation and the starting points of gelation were determined.