Curable composition and hardcoated article employing same

A hardcoated article comprising:

• a hardcoat layer formed by curing a curable composition by polymerizing both a group capable of ring-opening polymerization and an ethylenically unsaturated group, wherein the group capable of ring-opening polymerization is polymerized via ring-opening polymerization, the curable composition comprising:
• a cross-linkable polymer comprising a repeating unit represented by formula (1) below, the group capable of ring-opening polymerization being present in a side chain of the polymer,
• wherein in the formula (1), R1 denotes hydrogen or an alkyl group having 1 to 4 carbon atoms, P1 is a monovalent group containing a group capable of ring-opening polymerization, and L1 is a single bond or a divalent linking group, wherein
• (a) the curable composition further comprises a compound containing at least two ethylenically unsaturated groups, or
• (b) the cross-linkable polymer comprising a repeating unit represented by formula (1) further comprises a repeating unit represented by formula (2),
• wherein in the formula (2), R2 denotes hydrogen or an alkyl group having 1 to 4 carbon atoms, P2 is a monovalent group containing an ethylenically unsaturated group, and L2 is a single bond or a divalent linking group.