| abstract |
ethylene-based polymers with low hexane extractables. ethylene-based polymers, comprising the following properties: (a) a density of 0.9190 g/cc to 0.9240 g/cc; (b) a level of hexane extractables that is less than or equal to the lowest value of: (1) (a + (b * density (g/cc)) + (c * log (mi) dg/min)) based on the total weight of the ethylene-based polymer; where a = 250.5% by weight, b = -270% by weight/(g/cc), c = 0.25% by weight/[log (dg/min)], or (2) 2.0% by weight; (c) a g' (ag?= 500 pa, 170°c) that satisfies the following equation: g' = d + e [log (i2)], where d = 150 pa ee = -60 pa/[log (dg/min)]; and (d) a melt index (i2) of 1.0 to 20 dg/min; are made in the process comprising the step of contacting in a reaction configuration, which comprises a first tubular reaction zone 1 and a last tubular reaction zone i, where i is greater than or equal to (=) 3, under conditions of high pressure polymerization, and wherein the first reaction zone 1 has a peak polymerization temperature greater than the peak temperature of the i-th reaction zone, and wherein the difference in these two peak temperatures is = 30° ç. |