| 摘要 |
PURPOSE: To obtain a graft modified ethylene polymer excellent in adhesion to a metal or a polar resin by grafting a polar monomer onto an ethylene polymer having specified physical properties (e.g. melt flow rate). CONSTITUTION: This graft modified ethylene polymer is produced by grafting 0.1-50wt.% polar monomer (e.g. an ethylenically unsatd. monomer having a hydroxyl, amino, or epoxy group, an arom. vinyl, or a vinyl chloride) onto an ethylene homopolymer or ethylene/3-20Cα-olefin copolymer having an ethylene content of 50-100wt.%, a density of 0.85-0.98g/cm<3> , a melt flow rate(MFR) which is 0.01-200g/10min at 190 deg.C under a load of 2.16kg and satisfies the relation with the melt tension (MT) as expressed by formula I, an index of mol.wt. distribution Mw/Mn (wherein Mw is the wt. average mol.wt.; and Mn is the number average mol.wt.) of 2.5 or lower, and a temp. (Tm deg.C) at the max. peak in the endothermic curve obtd. with a differential scanning calorimeter satisfying the relation with the density (d) as expressed by formula II.
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