abstract |
The present invention relates to polyethylene compositions of bimodal molecular weight distribution and articles made therefrom, such as high top load blow moldings and transmission and distribution pipes. The composition comprises a low molecular weight (LMW) ethylene homopolymer component and a homogeneous, high molecular weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized by having a molecular weight distribution of less than about 8, MWD L. The composition is characterized by having a bimodal molecular weight distribution and a ductile-brittle transition temperature below T20, T db . In certain embodiments, the HMW component is characterized by an inverse comonomer distribution. |