Functional film, polarizing plate, and display device

A laminate comprising:

• a substrate film;
• and
• a functional film comprising:
• a copolymer including a repeating unit represented by formula (III), and a repeating unit represented by formula (II);
• and/or
• a crosslinked reaction product derived from the copolymer,
• in formula (II), R10 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• R11 and R12 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• R11 and R12 may be linked to each other;
• and X1 represents a divalent linking group, and
• in formula (III), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• ma and na each independently represent an integer of 1 to 20;
• and X represents a hydrogen atom or a fluorine atom;
• further comprising:
• an adhesive layer directly in contact with the functional film.