| 摘要 |
<p>A polyethylene is disclosed having the following properties: an annealed density D / weight average molecular weight Mw relationship defined by the equation D > 1104.5Mw-0.0116, and a Charpy Impact I / High Load Melt Index H relationship defined by the equation I > 35.OH-0.4. A polyethylene film is also disclosed having the following properties: a density of at least 957 kg/m3; a Dart Impact of at least 130 g; and a polydispersity of less than 12. Both may be made using a tridentate nitrogen-containing transition metal polymerisation catalyst.</p> |
