Controlling of Molecular Weight and Molecular Weight Distribution of Polypropylene by Using the Plastic Processing Equipment

Abstract

The relations between melt index and operating factors of processing machines of different type were investigated for the purpose of controlling molecular weight and its distribution of polypropylene having low melt indices. by using industrial plastic processing equipments. The conventional type extruders had the functions to control melt index under severe operating conditions, especially high-speed type twin extruder had the most effective functions.