Ethylene/alpha-olefin/non-conjugated polyene copolymer, and production process and use thereof

An ethylene/α-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an α-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures represented by Formulae (I) and (II),

• and satisfying the following requirements of from (i) to (v):
• a molar ratio of the ethylene/α-olefin is from 40/60 to 99.9/0.1;
• (ii) a weight fraction of the structural unit derived from the non-conjugated polyene (C) is from 0.07% by weight to 10% by weight in 100% by weight of the ethylene/α-olefin/non-conjugated polyene copolymer;
• (iii) a weight-average molecular weight (Mw) of the ethylene/α-olefin/non-conjugated polyene copolymer, the weight fraction of the structural unit derived from the non-conjugated polyene (C) (weight fraction of (C) (% by weight)), and a molecular weight of the non-conjugated polyene (C) (molecular weight of (C)) satisfy Formula (1),
• 4.5≦Mw×weight fraction of (C)/100/molecular weight of (C)≦40 Formula (1);
• (iv) a ratio of a complex viscosity η*(ω=0.1) (Pa·sec) at a frequency of w=0.1 rad/s to a complex viscosity η*(ω=100) (Pa·sec) at a frequency of w=100 rad/s, both obtained by linear viscoelastic measurement (190° C.) by using a rheometer, represented by P (η*(ω=0.1)/η*(ω=100)), an intrinsic viscosity represented by [η], and the weight fraction of the structural unit derived from the non-conjugated polyene (C) (weight fraction of (C)) satisfy Formula (2),
• P/([η]2.9)≦weight fraction of (C)×6 Formula (2);
• and
• (v) number of long-chain branches per 1000 carbon atoms represented by (LCB1000C) and a natural logarithmic number of the weight-average molecular weight (Mw) represented by [Ln(Mw)], obtained by using 3D-GPC, satisfy Formula (3),
• LCB1000C≦1−0.07×Ln(Mw) Formula (3).