| abstract |
[PROBLEMS] To provide a conjugated diene polymer capable of obtaining a polymer composition excellent in fuel efficiency, a polymer composition comprising the conjugated diene polymer and a filler, and the conjugated diene polymer. Providing a manufacturing method. At least one end of a polymer has a conjugated diene unit and a silicon-containing structural unit, is a nitrogen and / or oxygen-containing functional group, and has a specific unsaturated group-containing compound containing —NR 1 (R 2 ). A modified conjugated diene polymer, a composition comprising a conjugated diene polymer and an emphasis agent, and a method for producing the conjugated diene polymer. [Selection figure] None |