| abstract |
As a cyclic olefin ring-opening copolymer comprising a structural unit derived from a monocyclic cyclic olefin and a structural unit derived from a norbornene compound, the extrapolated glass transition termination temperature (Teg) and the extrapolated glass transition initiation temperature ( Tig) provides a cyclic olefin ring-opening copolymer having a difference (ΔTg) of 30° C. or less and a weight average molecular weight (Mw) of 50,000 to 1,000,000. |