Abstract
A process control concept for peroxide-initiated degradation of polypropylene was presented. The link-up of a twin-screw extruder to an on-line Rheometer and a computer system using a newly developed program package can be used to form a process control system unaffected by external disturbing influences and leading to a long-term constant product quality. Work is still to be done concerning development and optimization in the area of layout and design of adapter systems and concerning the measures for lowering the controllability ratio Z1. Special attention should be given to a processing concept to enable changes in Mw and MWD independently of one another.
Acknowledgments
Special thanks are extended to Dipl.-Ing. H. Herrmann and Dipl.-Ing. J. Nettelbreker from Werner & Pfleiderer Comp., Stuttgart, concerning the fruitful cooperation. The author is grateful to the companies Deutsche Solvay-Werke, Rheinberg, Rheometrics Corp., Piscataway/ USA and Peroxidchemie, Munich, in supporting this project.
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