| 摘要 |
PROBLEM TO BE SOLVED: To provide an ethylene-α-olefin-non-conjugated polyene copolymer excellent in roller kneading processability and extrudability.SOLUTION: The ethylene-α-olefin-non-conjugated polyene copolymer satisfies the following conditions (A), (B), (C), (D) and (E). (A) The limiting viscosity [&eegr;] is 0.5-1.8 dL/g. (B) When the total of the content of ethylene units and the content of α-olefin units is taken as 100 mol%, the content of ethylene units is 50-90 mol% and the content of α-olefin units is 50-10 mol%. (C) The iodine number is 1-50. (D) The ratio of the tanδ at 100°C and 2 cpm to the tanδ at 100°C and 1,000 cpm is 1.0-1.7. (E) The ratio of the Z-average molecular weight to the number-average molecular weight is 15-25, and the ratio of the weight-average molecular weight to the number-average molecular weight is 3-5. |
