| 摘要 |
PROBLEM TO BE SOLVED: To provide a copolymer capable of providing a rubber composition and pneumatic tire in which low fuel consumption and wet grip performance are well balancedly improved.SOLUTION: There is provided a copolymer which is obtained by reacting a specific N-containing silicon compound with an active terminal of a copolymer obtained by polymerizing a conjugate diene compound and a vinyl benzaldehyde acetalized derivative using a polymerization initiator expressed by formula (I) and which has a weight-averaged molecular weight Mw of 1.0×10-2.5×10. |
