Degradation of polypropylene for future improved processability

Abstract From the Canadian patent

Thermoplastic polypropylene polymers of improved processability obtained by initial partial degradation of high molecular weight polymers using a chemical prodegradant present in excess of the amount that reacts during pelletization. After pelletizing the polymer can be handled and shipped without difficulty. When remelted by extruding or the like, the additional prodegradant in the pellets reacts further reducing the molecular weight as well as the molecular weight distribution of the polymer to a point where high capacity production of quality fibers and extruded products can be obtained. The prodegradant is preferably of the type that predictably and controllably affects the polymer …