| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to an ethylene and -olefin copolymer obtained by reacting at least one metallocene catalyst on a support, ethylene and at least one other -olefin in a gas-phase reactor. The copolymer has the following properties: density from 0.930 to 0.970 g/cm3; b) melt flow index from 0.7 to 200 dg/min; c) melt flow index ratio from 10 to 25; d) ESCR higher than 1000 h; e) 1% section modulus greater than 75000 psi; and f) molecular weight distribution less than 3.5. The copolymer has differential scanning calorimetry peak temperature represented by a single peak. Disclosed also is a composition for making moulded articles, an article and a method of producing an ethylene and -olefin copolymer. ^ EFFECT: invention improves properties and processability of the ethylene and -olefin copolymer. ^ 33 cl, 1 dwg, 5 tbl, 3 ex |
