Rheology. This report is demonstrating the relationship between the viscosity of a solution and temperature, concentration and shear rate. This report is going to analyse the reasons why there is a decrease positive relationship between viscosity and conc

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PY1070, Rheology abstract

Characterisation of rheological behaviour of pharmaceutical fluids

This report is demonstrating the relationship between the viscosity of a solution and temperature, concentration and shear rate. This report is going to analyse the reasons why there is a decrease positive relationship between viscosity and concentration and a negative relationship between viscosity and temperature and also shear rate. 3 experiments are conducted to prove the hypothesis above. The results of the experiments are explained in terms of intermolecular forces between the molecules in solutions.  

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Viscosity is the resistance for a fluid to flow. Shear stress and shear rate are defined as the force and speed of moving a fluid respectively. Rheology is the study of these viscous fluids and their movement and deformation properties.

Part 1

In the part 1 of the experiment, the viscosity of 3 different concentrations of methylcellulose is measured using a Brookfield viscometer (50 r.m.p). As shown on the graph, the viscosity has a direct relationship with the concentration. As shown below, the structure of methylcellulose encompasses a hydrophilic structure which forms hydrogen bond when mixed with water. As ...

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