| 摘要 |
<p>32pf22Novel copolymers of ethylene and a olefins are provided having (a) a density in the range 0.900 0.940 g/cm (b) a melt index MI (2.16 kg 190°C) in the range 0.01 50 g/10 min (c) a molecular weight distribution (Mw/Mn by conventional GPC) in the range 2.0 4.5 (d) a comonomer partition factor C> 1 and (e) a melt index MI (2.16 kg 190°C) normalised Dow Rheology Index (DRI) [DRI/MI] in the range 3 20. The novel copolymers may suitably be prepared by use of catalyst systems comprising activating supports. The copolymers are suitably prepared in the gas phase preferably in a single reactor. The copolymers exhibit unique properties in particular with respect to their rheology.</p> |
