Copolymers

摘要

Copolymers of ethylene and an alpha-olefin having from 3 to 20 carbon atoms are characterised in having (a) a flow activation energy (Ea) in the range 50≤Ea≤200 kJ/mol, (b) a degree of long chain branching (LCB/1000C) as measured by GPC/solution viscometry in the range LCB≤0.03 Ea - 1.5 to LCB≥0.25, and (c) a breadth of molecular weight distribution (Mw/Mn) greater than 2.5. The novel copolymers may be used to prepare films.