| abstract |
(57) [Problem] To provide an olefin-based block copolymer having various excellent properties. The olefin block copolymer is represented by the following general formula (I) or (II): PO 1 -fR (I) PO 2 -fR (II) , PO 1 is a branched olefin, a cyclic olefin, A conjugated diene, a monomer selected from non-conjugated polyenes, a polyolefin segment obtained from an α-olefin selected from linear α-olefins having 2 to 20 carbon atoms as needed, PO 2 has 2 to 20 carbon atoms. Obtained from an olefin selected from olefins and having 21 carbon atoms The polyolefin segment containing the above long-chain branch is shown, f represents an ether bond, an ester bond or an amide bond, and R represents a functional segment obtained by a chain polymerization reaction. ). |