Rheological studies of creams. I. Rheological functions and structure of creams.
Large number of washable (o/w type) creams were prepared for rheological investigation. The rheological functions known from the literature were determined in our studies. Rheological constants were determined by measurements and calculations. From these, we selected those ones which were applicable to characterize the energy status of the coherent structure and which gave the most information for practical work, elaboration of composition and evaluation of stability. These functions and parameters are the following: flow curves, viscosity vs shear time and viscosity vs temperature functions, Bingham-type yield value, plastic viscosity, structure breakdown rate constant, activation energy.
Erös
I
I
Department of Pharmaceutical Technology of Albert Szent-Györgyi Medical University.
Thaleb
A
A
D009824:Ointments; D012212:Rheology / Q000379:methods; D013816:Thermodynamics; D013997:Time Factors; D014783:Viscosity
D009824:Ointments