A propylene homopolymer having a stick-point of 30 cm or less during melt spinning, an oligomer content of less than 1500 ppm without postpolymerization treatment to remove oligomers, and a melt flow rate greater than 300 dg/min is prepared by radiation visbreaking in a multistage...http://www.google.com.au/patents/US5804304?utm_source=gb-gplus-sharePatent US5804304 - Radiation visbroken polypropylene and fibers made therefrom
