Tailored polyethylene chain structure is one of the most important issues to obtain high performance polyethylene in order to fit for the end-use. The intra and inter chain structures, such as molecular weight and molecular weight distribution, branch chain structure and distribution, can be well tailored according to the combination of polymerization process and catalyst. Bimodal polyethylene is composed of two parts. One is the low molecular part which can improve the processability of the resin; the othe...