Question

I don't know the question number of 3,4,7. Please solve this problem.

I have attached all the data that I need to solve the problem as a photo.

3. Someone in your company proposes to use an existing square pitch 150 mm diameter plasticating single screw extruder as a mixing device for a 40/60 PS/PP polymer blend. The metering section is 5 turns long and has a channel depth of 10 mm. Will dispersion of the polystyrene occur for a screw rotation of 60 rpm? Assume open discharge and a temperature of 220 °C. Use viscosity data given in example 6.1 and Fig. 6.32. 4. Someone in your company proposes to use an existing square pitch 150 mm diameter plasticating single screw extruder as a mixing device for a 40/60 PP/PS polymer blend. The metering section is 5 turns long and has a channel depth of 10 mm. Will dispersion of the polypropylene occur for a screw rotation of 60 rpm? Will there be enough time for dispersion? Assume open discharge and a temperature of 220 °C. Use viscosity data given in problems 6.3 and in Fig. 6.120. 170 °C 4 PS (Polystyrol 144 CH) Pa's 200 °C 3 230 °C log (viscosity) 0 -1 0 1 3 N 1/s LO log (shear rate) Figure 6.120 Viscosity curves for a polystyrene