| abstract |
Disclosed are an ethylene polymerization step, a catalyst used in the step, a production method employing the catalyst, and a product produced thereby. More specifically, a process for producing an ethylene copolymer from ethylene and an α-olefin comonomer is disclosed, and the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, such as pipe and The value and productivity of products including films can be increased. In particular, the produced ethylene copolymer has a trimodal or higher molecular weight distribution and density distribution, and thus has an excellent effect of improving the impact strength of the film when it is a linear low density copolymer. And if it is a medium density ethylene copolymer, it can be made into a pipe that has a low crack growth rate and can also be used at high temperatures. [Selection] Figure 1 |