METHOD OF INCREASING CRYSTALLIZATION TEMPERATURES IN POLYPROPYLENE

摘要

Disclosed is a method of increasing the crystallization temperature of polypropylene comprising melt deforming a base polypropylene in the absence of external nucleating agents, the melt deformation, resulting in an deformed polypropylene having a Tc from 4 to 20°C higher than the base polypropylene; wherein the melt deformation is accomplished in one or multiple deformation steps and at a Specific Energy Input of at least 0.05 kW-hr/kg.