| abstract |
A block copolymer having a polymer block [A] including two or more specific repeating units [1] and a polymer block [B] including one or more specific repeating unit [2] and/or repeating unit [3], and when a polymer block having heaviest weight average molecular weight is a polymer block [A1], the weight average molecular weight of the polymer block [A1] is Mw (A1) and a polymer block having the lightest weight average molecular weight is a polymer block [B], and the weight average molecular weight of the polymer block [A2] is Mw (A2) in the polymer block [A], having the ratio (Mw (A1)/Mw (A2)) of the Mw (A1) and Mw (A2) of 1.5 or more is provided according to the present invention, and the block copolymer has excellent fluidity at the time of molding and mechanical strength at the time of punching processing. |