ETHYLENE/ALPHA-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, AND PRODUCTION PROCESS AND USE THEREOF

摘要

A novel 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 of Formulae (I) and (II), and having a small number of long-chain branches,;;The novel ethylene/α-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/α-olefin/non-conjugated polyene copolymer, and a use thereof are provided.

主权项

1. 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).