Polypropylene with high melt strength and drawability

A method of melt processing a polypropylene blend, the method comprising providing a multimodal polypropylene blend in a molten state, said blend having a melt dispersion index of from 8 to 70 and a ratio Mz/Mn of at least 10 thereby enhancing a compromise between melt strength and drawability, and processing the blend in the melt by drawing and cooling the blend to form a solid product wherein the blend has been formed by reactive extrusion of a mixture of at least two fractions together with a mixture of a chain scission agent and a chain grafting agent.

A polypropylene blend useful in melt processing and providing for enhancing a compromise between melt strength and drawability, said blend having a dispersion index of at least 8 and a ratio Mz/Mn of at least 10, wherein the blend is bimodal and comprises from 50 to 70 wt. % of a first high molecular weight fraction and from 50 to 30 wt. % of a second low molecular weight fraction.

A multimodal polypropylene blend useful in melt processing and providing for enhancing a compromise between melt strength and drawability, said blend having a dispersion index greater than 15 and a ratio Mz/Mn of a least 10.

A multimodal polypropylene blend useful in melt processing and providing for enhancing a compromise between melt strength and drawability, said blend having a dispersion index of at least 8 and a ratio Mz/Mn of from 50-150.