Polymer, composition, molded article, cured product, and laminate

A polymer, comprising:

• a first structural unit represented by formula (1);
• a second structural unit represented by formula (2-1), formula (2-2), or both;
• and
• a third structural unit represented by formula (3-1), formula (3-2), or both:
• in the formula (1), R1 represents a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group, or a cyano group, and “n” represents an integer of from 0 to 4, and when “n” represents 2 or more, a plurality of R1s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure;
• in the formulae (2-1) and (2-2), R2s each independently represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group, or a cyano group, “g”s each independently represent an integer of from 0 to 2, “h”s each independently represent an integer of from 1 to 8, and when “h” represents 2 or more, a plurality of R2s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, R3s each independently represent a methylene group or an alkylene group having 2 to 4 carbon atoms, “c” represents an integer of from 0 to 2, and when “c” represents 2, two R3s are identical to or different from each other, R4s each independently represent a methylene group or an alkylene group having 2 to 4 carbon atoms, and “d” represents an integer of from 0 to 2, and when “d” represents 2, two R4s are identical to or different from each other;
• in the formulae (3-1) and (3-2), R10 and R11 each independently represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group, or a cyano group, “e” and “f” each independently represent an integer of from 0 to 2, “a” and “b” each independently represent an integer of from 0 to 8, when “a” represents 2 or more, a plurality of R10s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, and when “b” represents 2 or more, a plurality of R11s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, Z1 to Z4 each independently represent —O— or —S—, R5 and R6 each independently represent a methylene group or an alkylene group having 2 to 4 carbon atoms, “v” represents an integer of from 0 to 2, and when “v” represents 2, two R5s are identical to or different from each other, and two Z1s are identical to or different from each other, “w” represents an integer of from 0 to 2, and when “w” represents 2, two R6s are identical to or different from each other, and two Z4s are identical to or different from each other, La represents a divalent group represented by formula (L-1), (L-2), (L-3-1), or (L-3-2), “y” represents an integer of from 1 to 3, when “y” represents 2 or more, a plurality of Las are identical to or different from each other, and when “y” represents 2 or more, and “a” represents 1 or more, a plurality of R10s are identical to or different from each other, Lb represents a divalent group represented by formula (L-3-1) or (L-3-2), and G represents —O—, —C═O—, —SO—, or —SO2—;
• in the formula (L-1), Ra represents a divalent alicyclic hydrocarbon group having 5 to 30 ring members, or a divalent fluorinated alicyclic hydrocarbon group having 5 to 30 ring members, and “*” represents a bonding site;
• in the formula (L-2), R20 and R21 each independently represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group, or a cyano group, “j” and “k” each independently represent an integer of from 0 to 2, “q” and “r” each independently represent an integer of from 0 to 8, when “q” represents 2 or more, a plurality of R20s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, and when “r” represents 2 or more, a plurality of R21s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, and “*” represents a bonding site;
• in the formulae (L-3-1) and (L-3-2), As each independently represent —CO—, —SO—, or —SO2—, Bs each independently represent —O—, —S—, or —N(R30)—, R30 represents a hydrogen atom, a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, or a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, R22s each independently represent a halogen atom, a monovalent hydrocarbon group having 1 to 20 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 20 carbon atoms, a nitro group, or a cyano group, “1”s each independently represent an integer of from 0 to 2, “s”s each independently represent an integer of from 0 to 8, and when “s” represents 2 or more, a plurality of R22s are identical to or different from each other, and are optionally bonded to each other in an arbitrary combination to form part of a ring structure, and “*” represents a bonding site.