Polymer, method for manufacturing the same, and film

A polymer comprising:

• at least one structural unit (i) selected from the group consisting of a structural unit represented by formula (1) and a structural unit represented by formula (2), wherein a terminal structure of the polymer is independently a structural unit represented by formula (5) or a structural unit represented by formula (6):
• in formula (1), R1 to R4 are each independently a monovalent organic group having from 1 to 12 carbons;
• and “a” to “d” are each independently an integer from 0 to 4;
• in formula (2), R1 to R4 and “a” to “d” are each independently as defined in formula (1);
• Y is a single bond, —SO2— or >C═O;
• R7 and R8 are each independently a halogen atom, a monovalent organic group having from 1 to 12 carbons or a nitro group;
• “g” and “h” are each independently an integer from 0 to 4;
• and “m” is 0 or 1;
• provided that when “m” is 0, R7 is not a nitrile group;
• in formula (5), W is an electron-withdrawing group;
• R9 is independently a monovalent hydrocarbon group having from 1 to 12 carbons, an organic group having from 1 to 12 carbons and comprising an oxygen atom, an imidazole group, a triazole group, a benzimidazole group or a benzotriazole group;
• “i” is an integer from 0 to 4;
• and the symbol “*” indicates a bonding site;
• and
• in formula (6), Y′ is a single bond, —SO2— or >C═O;
• R10 and R11 are each independently a monovalent organic group having from 1 to 12 carbons or a nitro group;
• “j” is an integer from 0 to 5;
• “k” is an integer from 0 to 4;
• “m′” is 0 or 1;
• and the symbol “*” indicates a bonding site.