| 摘要 |
PURPOSE: A polyolefin is provided to ensure excellent pressure resistance and workability and high melt flow rate ratio, and to enable use for the manufacture of high pressure large caliber pipe with excellent full notch creep test. CONSTITUTION: A polyolefin has (i) density of 0.93~0.97 g/cm^3, (ii) broad orthogonal comonomer distribution index of 2~10, (iii) molecular weight distribution (average molecular weight / number average molecular weight) of 15~80, and (iv) melt flow index (190°C, 2.16kg loading condition) of 0.002-0.1 g/10 minute. The melt flow ratio of the polyolefin is 100~300. |
