Polymer melt index, polydispersity ratio of shear and the specific molecular weight distribution, and process for its preparation

摘要

A polymer having a melt index ranging from 0.01 to 100 g / 10 min. determined according to ASTM D1238 at 190 ° C with a weight of 2.16 kg, a density ranging from 0.90 to 0.97 g / cm3, a polydispersity (Mw / Mn) from 2.5 to 20, a ratio of shear (HLMI / MI) between 10 and 250 where HLMI is determined according to ASTM D1238 at 190 ° C with a 21.6 kg weight and a molecular weight distribution comprising a peak centered below a molecular weight of 100,000 and high molecular weight component it is extending to molecular weights above 10 million, where the percentage of the mass above 1,000,000 varies from 0.2 to 4% of the mass of said polymer, wherein polymer is a homopolymer comprised of monomer residues having 2 to 20 carbon atoms per molecule or the polymer is a copolymer comprising monomer residues and one or more comonomer residues, each having from 2 to 20 carbon atoms per molecule.