| 摘要 |
The present invention relates to an ethylene-isoprene random copolymer having an isoprene content of about 1 to 45% by mole, or an ethylene-isoprene copolymer having a Q-value of about 3.5 or less, wherein the Q-value is a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) The copolymer may be made using a catalyst comprising a compound of formula I, II or III, wherein M1 is a group IV transition metal, J is a group XIV atom, A and X3 are group XVI atoms, and Cp1 is a cyclopentadienyl-type group.
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