| 摘要 |
An ethylene copolymer is provided which is a copolymer of ethylene and an alpha-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/cm<SUP>3</SUP>, (c) the relationship between a vinyl group amount and MI2 of the polymer satisfies the following expression: <?in-line-formulae description="In-line Formulae" end="lead"?>(vinyl group amount: number of vinyl groups/1000 carbon atoms)<=0.004509+0.000815xlog(MI2),<?in-line-formulae description="In-line Formulae" end="tail"?> and (d) the relationship between a vinylidene group amount and MI2 of the polymer satisfies the following expression: <?in-line-formulae description="In-line Formulae" end="lead"?>(vinylidene group amount: number of vinylidene groups/1000 carbon atoms)<=0.013528+0.002445xlog(MI2).<?in-line-formulae description="In-line Formulae" end="tail"?>
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