ETHYLENE COPOLYMER CHARACTERISED BY IMPROVED ELASTICITY AND PROCESSABILITY

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to an ethylene copolymer. Described is an ethylene copolymer for producing an injection moulding product. The ethylene copolymer is obtained by polymerising ethylene and a C3-C18 α-olefin comonomer. The ethylene copolymer is characterised by activation energy of 40 kJ/mol or higher and molecular weight distribution of 2.4 or higher. The ethylene copolymer satisfies the relationships between oscillating torque and phase angle in the section P≤168.8-97.4×t+32.2×t²-4.0×t3 and P≤204.3-157.7×t+58.0×t²-7.5×t³, where t is oscillating torque (mcN·m) and is in the range of 60 to 6000 mcN·m, P is phase angle (°). An injection moulding product is also described.;EFFECT: improved elasticity and processability without degradation of impact resistance and inflexibility of the ethylene copolymer.;10 cl, 3 dwg, 4 tbl, 14 ex