ABSTRACT

Carriers and Common Issues with Formulation ........................................... 214 9.3 Introduction to Rheology .............................................................................. 216

9.3.1 What Is Rheology? ........................................................................... 216 9.3.2 Steady Shear Flow and Viscosity ..................................................... 217

9.3.2.1 Modeling Flow Curves ...................................................... 219 9.3.3 Yield Flow Behavior and Yield Stress .............................................. 219 9.3.4 Thixotropic Flow Behavior ...............................................................220 9.3.5 Viscoelasticity and Dynamic Rheology ........................................... 221

9.3.5.1 Storage Modulus, G′ .......................................................... 222 9.3.5.2 Loss Modulus, G″ .............................................................. 223 9.3.5.3 Tanδ.................................................................................... 223 9.3.5.4 Modeling Viscoelastic Behavior ........................................224