| 摘要 |
<p>Disclosed is an ethylene-a-olefin copolymer, comprising an ethylene-based monomer unit and a C3-20 a-olefin-based monomer unit, having a density (d) of 850-970 kg/m3, having a melt flow rate (MFR) of 0.01-100 g/10 min, showing a bimodal molecular weight distribution, having a ratio (Mw/Mn) of weight-average molecular weight (Mw) to number-average molecular weight (Mn) of 31-70, and showing a number of long-chain branchings (NLCB) carrying 5 or more carbon atoms, that is measured by 13C-NMR, of 0.7-1.0 per 1000 carbon atoms. This copolymer shows well-balanced melt tension, extrusion load in extrusion molding and mechanical strength.</p> |
