| 摘要 |
PROBLEM TO BE SOLVED: To provide a copolymer of a conjugated diene compound and a non-conjugated olefin, in which fossil resources are not used as the starting material, and a method of producing the copolymer, a rubber composition, and a tire.SOLUTION: A copolymer is obtained by copolymerizing at least a conjugated diene compound and a non-conjugated olefin. The conjugated diene compound and non-conjugated olefin include a biomass-derived compound having at least one of a bio-conjugated diene compound component and a bio-non-conjugated olefin component, synthesized from biomass including plant resources, and a value of δ13C of the biomass-derived compound is -30 per mil to -28.5 per mil, or -22 per mil or more. |
