Branched crystalline polypropylene compositions and methods for the
preparation of branched crystalline polypropylene compositions are
provided. For example, described herein is a process of preparing a
branched crystalline polypropylene composition that includes combining
two or more different metallocene catalyst compounds with a
polymerization medium that includes propylene, for a time sufficient to
provide branched crystalline polypropylene that has from 0.0 wt % to 2.0
wt % ethylene and a heat of fusion of 70 J/g or more.