An ethylene copolymer is provided which is a copolymer of ethylene and an -olefin
of 3 to 20 carbon atoms and has the following properties:
- (a) the melt index (MI2) at 190 C. under a load of 2.16 kg is
in the range of 0.0001 to 1000 g/10 min,
- (b) the density is not more than 0.899 g/cm3,
- (c) the relationship between a vinyl group amount and MI2 of the polymer
satisfies the following expression:
and
- (d) the relationship between a vinylidene group amount and MI2 of the
polymer satisfies the following expression: