ETHYLENE/1-HEXENE OR ETHYLENE/1-BUTENE COPOLYMER HAVING EXCELLENT PROCESSIBILITY AND ENVIRONMENTAL STRESS CRACK RESISTANCE

摘要

The present invention relates to an ethylene/1-hexene or ethylene/1-butene copolymer having excellent processibility. The ethylene/1-hexene or ethylene/1-butene copolymer according to the present invention has excellent processibility by having high molecular weight and wide molecular weight distribution, and can be applied to a heating tube with high internal pressure, a mining pipe or a large diameter pipe by means of excellent environmental stress crack resistance. The ethylene/1-hexene or ethylene/1-butene copolymer has weight average molecular weight (g/mol) of 10,000 to 400,000, molecular weight distribution (Mw/Mn, PDI) of 2 to 30, and environmental stress crack resistance (ESCR) of 400 to 20,000 hours, wherein the environmental stress crack is measured by a full notch creep test at 4.0 MPa and 80°C according to ISO 16770.