| 摘要 |
The present invention provides a polyethylene having a multimodal molecular weight distribution comprising: (i) 20-70% wt of a lower molecular weight ethylene polymer; (ii) 20-70% wt of a first higher molecular weight ethylene copolymer-, and(iii) 0.5-9.5% wt of a second higher molecular weight ethylene copolymer. Another embodiment has component (iii) at 0.5-30 % wt, where component (i) is polymerized in a first reactor, component (ii) is polymerized in a second reactor and component (iii) is polymerized in a third reactor, and optionally where component (i) is present in the second reactor during polymerization, and optionally where component (ii) is present in the third reactor during polymerization. |
