Abstract: Reactor blends of PE-HD/poly(ethylene-co-1-butene) with broad or bimodal molecular weight distribution for large hollow containers were synthesized in a two-stage slurry polymerization process.The mechanical and rheological properties of the blends were measured.  It showed that the density, melting point decreased and the environmental stress cracking ( ESCRFSo)increased with increasing 1-butene content in the blend. The stiffness of the blends depended on the degree of crystallinity. A balance of the mechanical and processing butene content and the weight ratio of properties could be obtained by adjusting hydrogen added, the 1butene onents and the weight ratio of components.

Key words: high density polyethylene, large hollow }ntainer, mechanical property, rheological behavior