| abstract |
To provide a multi-component copolymer having excellent crack growth resistance and abrasion resistance. The polypolymer is characterized by: comprising conjugated diene units, non-conjugated olefin units, and aromatic vinyl units, wherein: the peak-top molecular weight of the non-conjugated olefin moieties linked only by non-conjugated olefin units More than 500 and less than 40,000. |