| 摘要 |
Disclosed is a cyclic conjugated diene polymer comprising a main chain represented by the formula (I): [ <IMAGE> (I) wherein A to E are monomer units constituting the main chain in which A to E are arranged in any order, and l to p are, respectively, weight percentages of A to E, based on the total weight of A to E; A is selected from cyclic conjugated diene monomer units, B is selected from chain conjugated diene monomer units, C is selected from vinyl aromatic monomer units, D is selected from polar monomer units, and E is selected from an ethylene monomer unit and alpha -olefin monomer units; and l to p satisfy the following requirements: 0.5</=l</=100, 0</=m, n, o, p<100, wherein when l=100 and the A monomer units are comprised of monomer units which are the same, the polymer has a number average molecular weight +E,ovs Mn+EE of from 40,000 to 5,000,000, wherein when l=100 and the A monomer units are comprised of monomer units which are different, the polymer has an +E,ovs Mn+EE of from 25,000 to 5,000,000, and wherein when 0.5</=l<100, the polymer has an +E,ovs Mn+EE of from 500 to 5,000,000. The cyclic conjugated diene polymer has excellent thermal and mechanical properties. The polymer can be advantageously produced using a catalyst comprised of a complex of an organometallic compound containing a Group IA metal with a complexing agent, especially an amine.
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