1. 1 Viscosity of polymers B&R Ch. 14

2. 2

3. 3 Shear thinning

4. Zero-shear viscosity To what temperature must you raise your system if you are to reduce the viscosity of a polymer to 10% of its 100 o C zero- shear viscosity? The activation energy is E=11.40 kcal/mol and R=1.987 cal/molK 4

5. Zero-shear viscosity In order to cut the zero-shear viscosity of a commercial polymer in half, what percent shorter do the polymer chains have to be? 5

6. Poiseuille flow 6

7. 7 Processing additives B&R Ch. 18.4, 18.6 Reinforcing Agents Fillers Coupling agents Stabilizers Pigments Dyes Plasticizers Lubricants Curing agents Blowing agents Flame retardants

8. Injection Molding 8