MIXING ANALYSIS OF A REACTIVE EXTRUSION PROCESS IN A CO-ROTATING TWIN-SCREW EXTRUDER SCREW ELEMENT CHANNEL

摘要

Simulations of steady-state non-isothermal non-Newtonian reactive flow of molten polypropylene in a channel of a forward conveying screw element from a self-wiping co-rotating twin-screw extruder, performed using the commercial finite element simulation package FIDAP, are described. The reaction is peroxide-initiated controlled degradation of polypropylene. In the simulations, the screw speed, entering peroxide distribution, and pressure-to-drag flow ratio in the channel are all varied, and a mixing analysis of the flows is performed based on computed values of the flow efficiency parameter.