| abstract |
The present invention provides a conjugated diene system that has a rubber composition excellent in the interaction between a rubber component and an inorganic filler such as silica, can further improve the dispersibility of the filler, and provides a rubber composition having excellent fracture resistance and wear resistance. A copolymer is provided. (A) a structural unit derived from a conjugated diene compound, and (b) a general formula (1) [Wherein, X is Si, Sn or Ge, R 1 is a hydrocarbon group or —SiR 3 (R is a hydrocarbon group, and three Rs may be the same or different), and R 2 is a hydrocarbon. represents a group, n is an integer of 1 to 3, if the OR 1 is plural, OR 1 may be the same with or different from each other, when R 2 are a plurality, the plurality of R 2 are each It may be the same or different. ] A conjugated diene copolymer having a structural unit represented by: [Selection figure] None |