Rheological properties can infer about the formation and stability of intermolecular interactions. The interaction between molecules alters the rheological behavior of the flow, in addition to modifying the physical structure of the system, promoting changes in its viscoelastic characteristics. In this chapter, the techniques for performing steady-state rheological and dynamic shearing (oscillatory) tests will be discussed. Steady-state rheological measures include stress-ramp test, evaluation of hysteresis area (thixotropy/rheopexy), flow curve determination and study of the effect of temperature on intermolecular interactions through viscosity measurement. In dynamic shearing (oscillatory) tests, analyses involving the effect of deformation/shear stress and oscillation frequency on viscoelastic properties (storage modulus—G′ and loss modulus—G″) will be described. Changes that occur at the molecular level as a function of time and temperature can be linked to the viscoelastic properties of a system.